Hyun-soo, a C.E.O of a private detective agency, visits a pension with a client asking for her dog. While waiting outside of pension, he is falsely accused of kidnapping the client. During the arrest Hyun-soo, a serious car accident occurs and people misunderstand Hyun-soo as a prosecutor instead of a suspect. To find the real criminal, Hyun-soo pretends to be a prosecutor. Hwa-jin is an elite prosecutor but demoted to the provinces while trying to catch a law firm conglomerate Do-hoon, who colluded with the prosecutor’s leadership, meets Hyun-soo. Hwa-jin finds out the case is related to Do-hoon, she begins cooperating with Hyun-soo. While cooperating is on-going, they realize that there is a dirty truth behind the crime.

A high school student who comes across a supernatural notebook, realizing it holds within it a great power; if the owner inscribes someone’s name into it while picturing their face, they will die.

Once a legendary detective and a new mom, Mi-young, now works a desk job. But when overenthusiastic newbie Ji-hye is assigned to Mi-young's civil complaints team, the two female cops get caught up in a serious criminal case that triggers an action-filled comedic investigation.

Su-an, a performing arts high school student, becomes close with Seol, an actress and celebrity. During a trip, they realize that they have feelings for each other. However, misunderstandings pile up too much, and Seol leaves Su-an. Su-an later becomes an actress and returns to the winter sea, longing for Seol.