Prosecutor Park Jung-Woo loses his memory and finds himself in prison for a crime he believes he did not commit. He struggles to prove his innocence.
On his daughter's birthday, prosecutor Jung Woo finds himself in prison for reasons he can't recall. Dazed and confused, he fights for his freedom.
Prosecutor Jung Woo feels that Sun Ho is actually the criminal Min Ho, who has staged his suicide and switched identities to avoid prosecution.
In prison, Jung Woo finds pictures of his wife Ji Soo with Min Ho, which is allegedly the reason why he killed his wife and daughter.
Min Ho works with the jail guards in charge of Jung Woo. Meanwhile, Joon Hyuk is confused by the pattern of Jung Woo's memory loss.
Joon Hyuk visits Ji Soo on Ha Yeon's birthday to deliver a present, which serves as evidence to get him off the case and even incriminate himself.
As Eun Hye further investigates Jung Woo's case, Joon Hyuk's involvement with the situation further evolves as he seems to have switched sides.
Jung Woo is determined to get himself out of prison. Min Ho discovers that Eun Hye is working on Jung Woo's case, which makes things more difficult.
Ha Yeon is with Sung Gyoo in his apartment as investigators search Jung Woo's crime scene. Jung Woo recalls a detail about the night of the murder.
Min Ho and Jung Woo finally meet again in prison, but Jung Woo claims not to remember who Min Ho is. Chul Sik learns the reason why he's in jail.
Min Ho and Jung Woo question each other's life. However, Jung Woo begins to rethink his plan when Ha Yeon's existence gets into the conversation.
The chase continues as Min Ho gets word about Jung Woo's attempt to escape. Jung Woo meets a sick Ha Yeon, but moves on away from her to protect her.
As Jung Woo looks for the best escape route out of prison, Eun Hye helps him with his case by taking on a mission to find more pieces of evidence.
The Chamyeong group turns its back on Min Ho. Meanwhile, things look a little brighter for Jung Woo after the inmates escape the prison.
Min Ho is inches away from death, Jung Woo strives to find his missing daughter and Joon Hyuk races to find the last key piece of evidence.
Ha Yeon tells his father not to cry because she knows that he didn't commit any crime. Jung Woo turns himself in and demands a re-trial of his case.
Jung Woo learns about the staged suicide of Sung Gyoo. Also, Min Ho faces a choice between facing charges and clearing his company's name.
Min Ho thinks Jung Woo is bluffing when he says he knows where Jennifer Lee is. Soon, Min Ho gets into a situation that could spell disaster for him.
Yeon Hee switches to Jung Woo's side, and the help she provides is substantial enough to win the case. But Jung Woo doesn't start his fight just yet.
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