On April 12, 2023, the story begins with Kang Ji-won, a woman diagnosed with gastric cancer. Her life takes a dramatic turn when she discovers her husband, Park Min-hwan, in bed with her best friend, Jeong Su-min. An intense confrontation ensues, during which Min-hwan inadvertently causes Ji-won’s death. However, in an extraordinary twist of fate, Ji-won suddenly finds herself transported back to the year 2013, reliving her life with the same memories and knowledge from her original timeline. This astonishing event is explained as the intervention of her late father's spirit, who seems intent on giving her a second chance at life.
As Ji-won navigates this new chapter, she begins to understand that her suffering has a pattern rooted in her misfortune being transferred onto others. Determined to change her destiny, she devises a plan to have Su-min marry Min-hwan — aiming to exact revenge and escape the cycle of misery that has plagued her. Her strategy seems to work when she manipulates events to bring Su-min and Min-hwan together, but her journey is far from over.
Throughout the series, Ji-won's world becomes even more complex when she learns that Yoo Ji-hyuk, played by [Moon Sung-keun], a manager at her workplace, was also sent back in time following his own death in a car accident. Ji-hyuk, who in the previous timeline fell in love with Ji-won, harbors resentment against Min-hwan, whom he suspects was responsible for Ji-won’s original death. Despite the complications, Ji-hyuk decides to protect Ji-won, leading to a romantic relationship between the two.
Meanwhile, the romantic and emotional conflicts deepen. Oh Yu-ra, played by [Kwon BoA], Ji-won’s ex-fiancée, becomes an obstacle when she joins forces with Su-min and Min-hwan in their schemes to eliminate Ji-won, driven by jealousy and her own ambitions. Their relationship becomes strained when Min-hwan has an affair with Yu-ra, which ultimately causes his downfall.
In the course of the story, Ji-won’s close friend and colleague, Yang Joo-ran, unintentionally inherits Ji-won’s cancer from the original timeline. Fortunately, early detection allows her to receive treatment, sparing both women from an early death and giving hope for a healthier future.
As the series reaches its climax, tragic events unfold—Min-hwan is murdered by Su-min, who is later arrested and imprisoned. Yu-ra meets her end in a car accident just before she can flee the country to escape justice, after her conspiracy to kill Ji-won is uncovered. The story concludes with Ji-won and Ji-hyuk visiting an art exhibit on April 12, 2023. Having successfully avoided their previous misfortunes, they marry, have children, and seem poised to enjoy a peaceful life together, free from the shadows of their past.
This series beautifully explores themes of fate, revenge, love, and redemption, emphasizing how understanding and changing one's past can truly shape a brighter future.
