A fiercely competitive police officer and an idealistic prosecutor, former high school classmates, reunite while investigating a nationwide serial murder case, pulling them into both a dangerous pursuit and an unresolved personal past.

A village holds spirits of missing, deceased people. A search to find the missing bodies and discover the truth behind their disappearance occurs.

Right after Ryu Sun-jae, a top star, ends his life, Im Sol, his top fan, somehow ends up at a time when they were in high school and tries to protect him. A fantasy romance unfolds where people who missed each other in time finally meet.

At this mysterious late-night food cart run by an equally mysterious woman and her part-timer, customers are provided a space for respite and counseling through their dreams. But most importantly, everyone here is treated equally—living or dead.

For the families living at Sky Castle, an exclusive residential community that's home to Korea's elite, their children’s success means everything.