ACE

Dong-hyun is a high school student. One day, he falls from the rooftop and bumps into Pan-soo who is a passerby. Pan-soo is a member of a criminal organization. When the two men wake up in the hospital, they discover that they have switched bodies.

Tarō is a vagabond, a wannabe, an urchin, and not what anyone would call mainstream. He does not care. Do not even ask him about his background or age. He would not know and he would not bother. The man meets two others and he begins to experience a new set of conditions.

Kyosuke Fushimi is a former detective from e Kanagawa Prefectural Police Department's Homicide Division who currently works as a special agent of KSBC (Kanagawa Prefectural Police Department Investigation Analysis Center). He uses his genius brain and knowledge of past crimes to solve difficult cases. He also make use KSBC's latest investigation ability to find the serial killer who murdered his lover.