In a world where an AI programme allows people to communicate with their deceased loved ones, a flight attendant and a mother question the meaning of reality and humanity.

Hyun-su and Soo-jin have just gotten married. Seemingly out of nowhere, he starts talking in his sleep. ‘Someone’s inside.’ From that night forward, whenever he falls asleep, he transforms into…

Kim Ji-young, an ordinary woman in her 30s, suddenly shows signs of being inhabited by other women from her life, past and present.

An ordinary guy suddenly finds he has superpowers he can use to help his spirited daughter and the people around them, but he also runs into trouble in the process.