Deliveryman Jong-su is out on a job when he runs into Hae-mi, a girl who once lived in his neighborhood. She asks if he'd mind looking after her cat while she's away on a trip to Africa. On her return, she introduces to Jong-su an enigmatic young man named Ben, who she met during her trip. One day Ben tells Jong-su about his most unusual hobby.
Detached life of two young strangers is interrupted when they are transported to an unknown dimension.
The young granddaughter of a banker plays a game of hide-and-seek with her mother, Mabel. After Mabel walks away, the child disappears. A clerk, realizing the time, closes the vault she’d been hiding in. Mabel, unbeknownst to her child’s wandering, believes her daughter is locked in the now closed vault. Mabel frantically calls for help, resulting in a comedic rescue.
Artist assistant Ana feels like she isn't being seen in the art world. This feeling worsens when she begins to literally disappear, and must quickly find a cure.
The series follows a group of kids at an adventure camp who discover a strange artefact, while also drawn to the fate of four children who mysteriously disappeared twenty years ago.
