The story of two completely different people from opposite walks of life--Wang Ju An and Su Mo--that work in the same company. When feelings start to develop, they slowly surrender to them. But when difficulties arise; will their love withstand the ultimate test of opposites attract?

A single mother of five struggles for decades to forge a successful business empire, only to see her family descend into animosity and betrayal.

Zhang Hai Feng quits his job as a police officer after the death of his daughter, Duo Duo. However one day a serial murder case reveals new-found evidence about the the accident that led to Duo Duo's death. In order to find out the truth, Zhang Hai Feng starts to pursue the serial murderer and in the process, dies together with him. When he wakes up, he find himself back in the past; one day before his death occurs. He decides to make use of the wormhole to save Duo Duo from her death. Eventually, he starts to unravel deeply hidden secrets of the people around him, and the web of conspiracy that was planted 20 years ago.

Jin Kang Ho 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 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.

A romantic melodrama that depicts the story of a man and a woman who, exhausted from their harsh reality, begin to understand each other with new emotions and find themselves gradually changing.

About two people with their own painful stories who go through a complicated process of hurting and healing while falling in love with each other.

No Hwi Oh is a detective in the violent crimes division of the Gangnam Police Station. He thinks that he is doing well until his life suddenly takes a turn and he becomes a “crazy” person who can’t hold in his anger about anything.

Lee Min Kyung is a woman who is caught up in her own delusions and compulsions. She had lived an ordinary life as a pretty woman with a respectable job until “that incident” that caused everything in her life to break down. As a result, she was unable to trust anyone and is caught in a prison of her own making. Her delusions also have the unfortunate side effect of making everyone else around her angry.