Kim Hee Woo overcomes a rough start as a low-achieving high school student to work his way through college and eventually pass the bar exam. His relentless hard work has finally paid off, and he has become a prosecutor. In the course of his duties, he must investigate a politician suspected of corruption. But his investigation comes to an abrupt end when a mysterious man kills him. However, he later recovers, discovering that he is, in fact, alive. Brought back to the world of the living, he finds that he must return to college and complete his academic studies all over again, while trying to uncover the truth about what happened to him. During his journey, he meets Kim Hee Ah, an exceptionally intelligent young woman who is also the youngest daughter of the family that owns the wealthy Cheonha business group. As Kim Hee Woo and Kim Hee Ah intensify their search for answers, they discover that a shadowy cabal of wealthy power brokers may have played a role in his "death.".