Jin Kang-Ho (Cha Tae-Hyun) is an enthusiastic and effective detective. He tries to catch criminals by any means necessary. He also doesn't get along with other detectives. Kang Moo-Young (Lee Sun-Bin) is an enthusiastic PD of a TV investigative program. The program tries to catch criminals that the police could not. Kang Moo-Young is upright, but she will take risks to reveal the truth. Jin Kang-Ho and Kang Moo-Young unexpectedly meet and they begin to cooperate on unsolved cases.
