Han Dong-Soo (Shin Ha-Kyun) is a livelihood lawyer. He randomly picks a prisoner to visit and picks up a case. He is usually rational and reasonable, but deep within his mind exists a dark side. Something triggers him to cross the line and step into the world of evil. His younger half-brother is Han Beom-Jae (Shin Jae-Ha). Han Beom-Jae works at a second-hand computer shop and he also acts as a case broker for Han Dong-soo, bringing him clients. One day, Han Beom-Jae notices that Han Dong-Soo has changed since he brought him a case.
