

While working part-time as a delivery girl, Trudy accidentally stumbled upon her boyfriend and her sister registering for marriage. Heartbroken, she rushed into a flash marriage with Henry, an Ubor driver. Henry agreed to marry Trudy to appease his mother's pressure for him to settle down, but he had been holding onto a promise he made five years ago to the girl who saved his life. In their marriage, Henry hid his true identity, but as they spent time together, he gradually became attracted to Trudy and realized his feelings for her. At the same time, under Henry's care, Trudy's heart began to open up to him, and she unexpectedly found herself falling for him. Just as Trudy worked hard to earn money and nurture their marriage, she discovered a shocking secret: this handsome Ubor driver was actually a billionaire CEO! Even more astonishing, Trudy was the girl from five years ago!

Kang Do-hyun chooses an ordinary life as a taxi driver to avoid inheriting his father’s family business. One day, he happens to rescue Cha Eun-seol, who is fleeing a chase and has accidentally taken the wrong medication. After a one-night encounter, they part ways and return to their separate lives. Four years later, a stylish CEO shows up with a child and proposes marriage to Do-hyun. After registering their marriage, Eun-seol faces pressure from her parents to abandon the child, but Do-hyun appears and protects both mother and daughter. As her company falls into crisis, Eun-seol attends a family banquet of Taegang Group—the most powerful conglomerate in Country A—to secure a 10-billion-won investment, unaware that the chairman is actually her husband’s father. At the banquet, despite pressure from her former fiancé Gu Jung-tae, Do-hyun’s father protects his granddaughter Kang Rumi and makes his presence known, yet he can only approach her as a “grandfather” without revealing his true identity. As time passes, Do-hyun and Eun-seol grow closer. However, after failing to secure investment, Eun-seol risks both her company and her board position by making a dangerous bet with her father, Cha Myung-hwan. At this critical moment, Do-hyun seeks out his father, accepts the responsibility of becoming the heir, and begins to take action himself. In the end, at a press conference, the capital and influence Do-hyun has prepared turn the situation around. Eun-seol not only saves her company but also secures full ownership, achieving both love and success.