who is a and why in pretty little liars

Single mother Eleanor returns to L.A. with her twins, desperate to fund her daughter's medical care. She's blindsided by a reunion with her first love, Theodore, now a billionaire. Broke and burdened, Eleanor faces a cruel choice: reveal her past lie for her daughter's treatment, or keep the truth hidden and risk everything.

Five years ago, Nina Wade was betrayed by her own family, leading to an unexpected pregnancy with Joe Holt. She raised their son, Ben, in secret. But now, five years later, her world is shattered when Ben is diagnosed with leukemia. Desperate to save him, Nina plans to sell the precious jade that Joe left to her back then. Meanwhile, the Holts begin a city-wide search for Ben. In the midst of this chaos, Nina finds herself working as Joe's secretary at Holt Corp. As they spend more time together, their relationship begins to heat up in ways neither of them expected.

Five years ago, after a night of drinking, Sylvia Snow accidentally stumbled into the wrong room and spent a passionate night with a man she didn't know—Eric Payne. That night led to the birth of their son, Noel Snow. When Noel turns four, he starts showing strange symptoms and is locked away, treated like a monster. Just when things seem hopeless, Eric shows up and saves Noel. Sylvia soon discovers that the man from that night isn't just any man—he’s a legendary werewolf, and the secret behind their son's condition is far more extraordinary than she ever imagined.

When college student Chloe Fawn discovers she's pregnant, she's determined to raise her baby alone, until she learns the father's shocking identity: Ethan Toll, the domineering CEO of Sunnix Group! This powerful billionaire storms into her quiet life like a force of nature, refusing to let her go and showering her with love beyond her wildest dreams!

Lila needs money to save an orphanage, while William is a billionaire who hates gold-diggers. Though they suddenly become married, William decides to hide his riches thinking that Lila could just be after his money. As time passes, William falls deeply in love with Lila… problem is, she hates liars more than anyone else.

Anna Poole had faced hardships since childhood. While trying to resolve a company crisis with her good friend, Serene Cox, Anna was drugged and sold to Mr. King. After Anna injured Mr. King and escaped, she ended up in the room of another man, Zach Howl, who was also under the influence of an aphrodisiac. As a result, they unexpectedly became intimate. As soon as Anna regained consciousness, she decided to confront Serene and accidentally overheard a conspiracy between Serene and the supposedly deceased Bryan Lane. Outraged, Anna confronted Serene, who injured her and caused a fire to start. In a life-threatening situation, Anna was saved by Waver Taylor, who had just returned to the country. Ten months later, she gave birth to twins, and one of them was taken away by the Browns. Along with a doctor, the Brown mother and daughter falsely claimed that the child died to suffocation.

Jade Scott, after being thrust through time, shares a fateful night with Caleb Zane, heir to the Duke of Southvale. Six years later, she returns to the capital with her young son, only to endure relentless humiliation at the hands of the powerful Princess Phoebe Vaughn.Just as her strength begins to waver, Caleb steps forward—shielding her, confronting Phoebe, and turning the tide.As their bond deepens, they realize their hearts had been intertwined long before destiny brought them together again. And the son Caleb has spent years searching for? He's been by his side all along. But the greatest revelation is yet to come: Jade is no ordinary woman—she's the rightful royal princess.

After Miranda Quinn, the heiress of the Quinns, spent an intimate night with Daniel Jonas, he mysteriously vanished without a trace. Miranda's stepmother and stepsister conspire to catch her in the act and accuse her of promiscuity, leading to her expulsion from the house. Feeling betrayed, Miranda retreats to the countryside and apprentices under an expert doctor to learn medical skills. Discovering her pregnancy later on, she gives birth to quintuplets. Six years down the line, she returns to her homeland with her children and opens a clinic. Meanwhile, her five children are eager to find their father...

Lila needs money to save an orphanage，so she hastily marries William, thinking he’s just a poor guy. But after falling for him, she discovers he’s actually the city’s richest CEO......problem is, she hates liars more than anyone else.

Five years ago, Iliana Mercer unexpectedly became pregnant with the child of Ernest Abbott, the richest man in Verdora. Years later, a chance encounter reignites their passionate connection. Ernest subsequently purchases the bakery where Iliana works, seemingly determined to be part of her life. Despite Iliana's focus on professional independence, Ernest's persistent pursuit gradually breaks down her resistance. Ultimately, she not only establishes herself professionally but finds herself cherished by both Ernest and their adorable son, transforming her life in unexpected ways.

The only daughter of the Alpha King, Isabella, lost everything during a massacre and even became a slave to another pack. Years later, her childhood knight suddenly reappears and guides her in regaining her white wolf powers. They then fight side by side to bring down the all the liars, traitors, and murderers in their lives.

Brilliant little Tammy Walton lives with her mom, Cheryl Davis, who gets treated like dirt by her husband for not being pretty enough. Dennis Walton is too busy spoiling his sister-in-law, Theresa, and her daughter, Angela, to care about his actual family. When Cheryl dies, Tammy crashes Dennis' wedding in funeral clothes and ends up dying in the fight.Plot twist - she wakes up a year earlier with Cheryl still alive! This time, Tammy uses her smarts to save her mother's life, help her get beautiful again, and convince her to divorce the scummy Dennis. Cheryl finally dumps him and becomes the country's first female billionaire.

Sarah Young had a crush on Zain Xavier for seven years. Unexpectedly, she became his wife, and everyone laughed at her for going from rags to riches. However, she ignored them and only cared that Zain was finally hers. When they got married, she didn't care if he didn't love her now. She was confident he would fall in love with her in the end. However, it soon became boring as Zain was never interested. Sarah felt that she was rich, pretty, and had amazing curves. Why should she waste her time on a cold robot like Zain? Immediately after coming to her senses, she slammed the divorce papers before Zain. After that, they would both go on different paths. Zain could hit the high road while she had fun with young, handsome men. After the divorce, Zain often found his ex-wife's scandals on the trending list. Last night she was captured having dinner with the new rich in xx tech company, and today she was building a new "love nest" with a handsome internet celebrity??? Zain threw his phone away and cursed, "Fuck with this love nest! That's my woman!" To that, Sarah, who was enjoying life, replied, "Sir, who are you?" 

Jack Quin had been pursuing Wendy Vale for five years, only to be dismissed as a clingy nuisance. Deciding to lock his heart and never love again, he unexpectedly saved Kate Mason, daughter of the Mason family. When Jack finally stopped pursuing Wendy, she started to cling to him. Kate smirked, "If you think you can touch my man because you're pretty, think again. No one touches him without my permission."

College student Anna is betrayed by her boyfriend, who tries to sell her virginity at a club. Business tycoon Ryder saves her... but then invites her to sign a BDSM contract, making her his "Kitten". Little does he know that she's actually the angel who saved him when they were young - the one he's spent a decade searching for.

Monica’s first love was the high school quarterback, Sebastian, who grew up to be a star football player while Monica is now just a cleaner. Sebastian resents Monica for aborting their baby seven years ago, but little does he know that Monica has always been deeply in love with him - until their secret child Ian calls him Dad!

She is a long-lost heiress, yet she ends up betrayed by her boyfriend, and her foster parents sell her to a much older man. Out of desperation, she hastily marries a street stall vendor. Little does she know, the street stall vendor is actually a dignified CEO! From then on, the CEO dotes on her and teaches those who mistreat her a lesson. What an affectionate man, indeed!

Susan Todd, heiress of the wealthy Todds, was abducted as a child and subsequently rescued by Hans Lawson. In gratitude, she marries Hans, who is now the CEO of Lawson Group. Hans has been searching for the little girl with whom he made a marriage pact back then. Unaware that Susan is the one, Hans forces her to divorce, only to be overcome by regret when Susan reveals her true identity later on.