Jeju Island is taken over by evil spirits. An exorcist, priest, and chaebol heiress are fated to fight against evil spirits attempting to end the world. “They are stirring at last.”

Yoo Mi is the woman who tells a small lie and ends up living someone else’s life. Hyun Joo is a woman who lives her life holding herself above everyone, treating them with neither kindness nor malice. She has a subtly tense relationship with Yoo Mi. Ji Hoon is Yoo Mi’s husband who is ambitious and future-oriented. Ji Won is a dependable senior who is the only person whom Yoo Mi trusts.

Communicating via a walkie-talkie that transcends time, a profiler from 2015 and a detective from 1989 join forces to tackle crimes and injustice.