After a powerful conglomerate chairman is betrayed by his children and wakes up in the body of a young soccer player, he uses his business genius and athletic physique to seek ultimate revenge against his family.

A tragic accident leaves an ambitious prosecutor with the mind of a child – forcing him and his mother to embark on a journey to heal their relationship.

Orphaned, Nam Yujin grows up with the three Nam brothers, with the promise that one of them will marry her on her coming-of-age. But upon the return of their true sister Nam Sua, Nam Yujin loses their love and sinks into desperation. Even when she marries her suitor Ha Jihoon, they deem her as attention-seeking and only regret after unveiling Nam Sua's true colors—but Nam Yujin is never coming back.