A young woman grows close to a prosecutor as she works with him as a trainee in a murder case. However, things take a turn when she inexplicably becomes a suspect.

Eun Bong Hee is a prosecutor trainee who unfortunately becomes a murder suspect. Noh Ji Wook who is a prosecutor tries to help Eun Bong Hee but loses his job in the process. After the prosecution, Eun Bong Hee who is free from the crime falls in love with Noh Ji Wook. But Noh does not accept her love towards him but offers to help her in finding the real suspect. In the mean time the real murderer plots a plan to avoid being caught.—Arvind Vikram

A forgetful killer can be a dangerous thing. Noh Ji Wook (Ji Chang Wook) is a prosecutor who changes jobs to become a private attorney at a powerful law firm. Eun Bong Hee (Nam Ji Hyun) is a prosecutor trainee who works with prosecutor Cha Yoo Jung (Nara), Ji Wook's ex-girlfriend who desperately wants to win him back. Attorney Ji Eun Hyuk (Choi Tae Joon) is a longtime family friend of Ji Wook's but harbors some resentment about their different family circumstances. When a murderer strikes, Bong Hee suddenly finds herself as a suspect in the murder. But it appears the real killer has amnesia, and the killer keeps coming after Bong Hee and Ji Wook. Can the two team up to catch the forgetful killer?