After a plane crash took his family, an ex-cop forms an investigation team and meets a genius ex-con whose brother died, starting a rivalry and partnership.

Choi Kang-woo, a former police and leader of Taeyang Insurance's investigators team, decides to create his own investigation team, after an airplane crash that took the life of his wife and son. He then meet Kim Min-joon, a genius former swindler whose brother was also a victim of the crash, thus begin their rivalry and cooperation.—Rahma