When people get cornered, they all do whatever it takes to save themselves. Under such situations, some would even kill other innocent people. As a mysterious corpse gets found in the middle of nowhere, four upper-class individuals emerge as prime suspects. They get nervous as the investigation focuses on them since they did not live such innocent lives, so they try to hide the truth whatever it takes. A determined detective, Dok Go Young, and ardent lawyer, Choi Ja Hye, try to reveal the truth behind what happened on the day of the murder. As the investigation continues, more unexpected events and discoveries make things difficult. Who was the culprit behind the murder? Why did such a crime happen in the first place? Return is a thriller about the dead, the killer, and the ones seeking the truth.

A mermaid from the Joseon period ends up in present-day Seoul, where she crosses paths with a swindler who may have ties to someone from her past.

Ji Eun-ho, a famous actor, decides to publish an autobiography to find his long-lost love. He hires a woman named Seo Jung-eun to ghostwrite his book but finds her somewhat familiar.