"My Happy Ending" revolves around the tumultuous life of Seo Jae Won, a successful CEO with what seemed like a picture-perfect family. With the doting care of her stepfather and all the favorable conditions, her life becomes full and stable. However, Jae Won';;s happiness oveight vanishes as she uncovers the heartbreaking secrets her husband has been hiding.

One day, Jae Won reluctantly accepts the horrifying reality that her husband is having an affair with her closest friend. Surprised and heartbroken, she must face the unexpected betrayal and pain from the person she trusted the most. What';;s even more dreadful is the revelation that her stepfather, the one responsible for her mother';;s death, is plotting against her to protect his dark secrets.

With the series "My Happy Ending," Jae Won embarks on a jouey to unravel the sinister secrets behind the infidelity and the mysterious death of her mother. She also has to deal with constant surveillance from a mysterious colleague, someone who has been observing her every move for many years.

Seemingly trusting no one, Jae Won confronts the most challenging aspects of her life, trying to shield herself from oppression and expose dangerous conspiracies. "My Happy Ending" is not only a story of betrayal and agony but also the jouey of a strong-willed woman determined to face the truth and seek a new chapter of happiness in a tumultuous life.