why did patrick dempsey leave grey's anatomy

Avril Jepsen enters the book to cure a terminal illness and has a son, Josh Snow, with the male lead, Mitch Snow. But when Josh and Hannah Reed stop her from marrying Mitch, Avril leaves, causing Josh and Mitch to fall into darkness. Returning to the book at the system’s request, Avril unexpectedly brings her real-world son, Finn Grant, with her. She rejects Mitch and plans to leave after Josh's birthday. Mitch tries to stop her, but her husband, Noah Grant, arrives just in time to take her back. Avril returns to her life, and eventually, the fictional world also returns to peace.

Simon was the son of Fletcher and Yvette, but his birth resulted from Fletcher's drunken one-night stand. From the moment Simon was born, Fletcher treated him coldly and showed clear favoritism toward his first love's son, Richard. This ongoing discrimination caused great pain for both Simon and Yvette, which eventually led Yvette to leave with Simon. After leaving, Yvette met Simon's cello teacher,Matthew,who gave Simon a fatherly love he had never known before.The three of them supported each other closely.Meanwhile,Fletcher, having realized his past mistakes, could only silently watch as Simon thrived under Matthew's care, bearing alone the pain caused by his own wrongdoings.

Harrison Chambers signed a gratitude contract with Kira Sue's mother, giving up his dream of developing of northwest to marry into the Sue family. For five years, he took care of Kira with great devotion. However, after a tragic fire, Harrison realizes that his efforts could not win her heart. She still harbors feelings for her first love, Zane Lee, who is about to return from abroad. Deciding to leave, Harrison heads to the northwest. Only after his departure does Kira realize her true feelings, but it is already too late.

Susan Lane never expects to witness her husband's betrayal with her own eyes. Heartbroken and determined to leave him, she asks for a divorce—only to face his cruel retaliation. Just when she feels trapped with no way out, her best friend's stepson, Ken Shaw, steps in to protect her. As they begin living under the same roof, emotions begin to grow in a way neither of them has expected. Ken can no longer hide his growing love for her, and despite her initial hesitation, Susan finds herself drawn to him as well. Against all odds, they eventually choose love and embrace a future together.

With her family facing bankruptcy, her father tragically ending his own life, and her mother suffering from severe illness, Amy Cole finds herself with no option but to accept money from Will Ford's mother and leave Will. Several years later, Will's mother looks for her again, asking her to return to Will's side. It turns out that after Amy breaks up with him, Will has been fooling around outside and has no direction in his life. He keeps changing his girlfriends every now and then. On top of that, he even wants to marry a scandalous celebrity. Hearing that, Amy knows that her chance has come. What's wrong with pursuing the man she loves all over again? However, unbeknownst to her, all of this is part of Will's trap.

"Why does your son look so much like me?" Upon hearing this question, Holly Shaw fell silent. Five years ago, her parents divorced, and her callous father expelled her from their home. In order to pay for her mother's medical treatment, she agreed to substitute for another girl's companionship that night. Now, five years later, she returns with two adorable children, determined to reclaim what is rightfully hers. Little does she expect to once again encounter the man from that fateful night—Allen Carter.

Seven years ago, Grace Taylor accidentally spent a night with Justin Randall, the powerful CEO of Randall Corp, and gave birth to twins. But under her father's orders, one of the babies was stolen at birth.Now, she returns to the country to find her missing child, only to cross paths with Justin once more. Neither recognizes the other at first, but sparks quietly reignite. By chance, Hugo makes friends with a boy who looks just like him—and it turns out he's the lost twin. As the truth unravels,Justin discovers that Grace is the mother of his children. When she tries to leave with the boys, he begs her to stay. In the end, past wounds heal, love finds its way back, and the family is finally made whole.

Seven years ago, Grace Taylor accidentally spent a night with Justin Randall, the powerful CEO of Randall Corp, and gave birth to twins. But under her father's orders, one of the babies was stolen at birth.Now, she returns to the country to find her missing child, only to cross paths with Justin once more. Neither recognizes the other at first, but sparks quietly reignite. By chance, Hugo makes friends with a boy who looks just like him—and it turns out he's the lost twin. As the truth unravels,Justin discovers that Grace is the mother of his children. When she tries to leave with the boys, he begs her to stay. In the end, past wounds heal, love finds its way back, and the family is finally made whole.

Six years ago, Luke Kranz gave his life to protect Ava Ewing. Ever since, she has carried the weight of both her family and career alone, tirelessly struggling to save enough for her daughter Ellie’s heart surgery. Just when she thought she had no time for anything else, Evan Foster returns after years abroad, reentering her life with unresolved resentment and buried emotions. Unable to let go of the past, he keeps pushing her, testing her boundaries, and stirring up everything she tried to leave behind.

After her fiancé and stepsister betrayed her, Zoey Quin hastily married Henry Tyler, her fiancé's uncle. She thought it was just a mutually beneficial cooperation, but little did she know that Henry had loved her for years. After several twists and turns, Zoey was touched by Henry's tenderness and attention to detail, and she finally learned of his long-hidden affection. Then they lived happily ever after.

William Coffey and Shelly Richards had been together for years, deeply in love. But just before they could get married, tragedy struck—William's sister Lea died in an incident involving Shelly's younger brother. The Coffey family was devastated and blamed Shelly, their grief turning into resentment. While William was in the hospital, his mother forced Shelly to leave. At the time, Shelly was already pregnant, but with nowhere to turn, she had no choice but to leave the country. Five years later, Shelly returned and ran into William again. The feelings he had buried for so long came rushing back. He still resented her for disappearing without a word, but no matter how hard he tried, he couldn't stop loving her.

Six years ago, Winni and Chester were a loving couple, until Chester's old friend Ruth returned to the country. Ruth disguised herself with a kind face and became friends with Winni, secretly plotting to replace Winni as Chester's wife. Not long after, Winni became pregnant, but the doctor informed Chester that the child had no blood relationship to him. Chester iced out Winni and gradually grew closer to Ruth. Six years later, Winni's son, Ron, was critically ill with leukemia. Only Chester's bone marrow could save him. In order to please Chester, Winni had to bow down to Ruth. However, during their interaction, she gradually uncovered why Chester thought Ron was an illegitimate child.

Elena Graywood couldn't understand why her grandfather insisted on her marrying a man from a mountain village. Until, this man revealed to her that he was actually a divine physician with unparalleled medical skills.

Ten years ago, the once optimistic Sam Rider was forced to leave his family and venture to a distant land due to a misunderstanding. He lived alone, experiencing life's trials and tribulations. During this time, Sam encountered a life-threatening accident, hanging by a thread until he was saved by a girl, Helen Foster. Grateful for her rescue, he silently stays by her side and protects her to repay the debt of saving his life. The two eventually become lovers. However, life after marriage isn't a happy one. The burdens of life and various misunderstandings place immense pressure on both of them, dealing a huge blow to their relationship. Nevertheless, Sam doesn't give up. In the end, through his efforts, Sam earns approval from Helen's family and ultimately lives a happy life with Helen.

Xandra Quinn has only ever had her grades. So when school heartthrob Robert Miller confesses publicly, she shocks everyone by saying yes. She knows it's a trap set by her jealous rival Amelia Moore, but why refuse? Xandra stops studying, openly wasting time with Robert, while Amelia celebrates her "victory." What she doesn't know—Xandra already has a Harbard offer. On exam day, Amelia mocks her, only to find Xandra revealed as the national top scorer—with a perfect score.

After being betrayed by her stepsister, Melody Chase crossed paths with Edward King, an affluent figure in Rivers, and had an intimate night with him. Little did she know that her stepsister, Bella Chase, ended up taking her place and stayed by Edward's side. To make matters worse, Bella even went to great lengths to steal Melody's child.Five years later, when Melody returns from abroad, she unexpectedly reunites with her long-lost son and the father of her children.

Chris Leif gave up his family inheritance to become a stay-at-home husband for his wife, Queenie. When Queenie's first love,Nathan,returned to the country, her family began to look down on Chris. Pushed to his limit, Chris chose divorce and started a new life. Only then did Queenie and their daughter realize how remarkable Chris truly was—but it was too late to win him back.

Quinci once faked an affair and left Hadley after her father's imprisonment. Six years later, she was a struggling single mother with a critically ill son and crippling medical debt. When they met again, Hadley—now the heir to a fortune—mistook her for a gold digger and scorned her at every turn. Only after learning the boy was his own son did he uncover the truth, leaving him shattered with remorse.