Den unge mand Jong-soo møder en gammel bekendt, Hae-mi, tilfældigt på gaden. Kvinden spørger om Jong-soo vil passe sin kat, da hun skal rejse til Afrika. Senere, da Hae-mi kommer tilbage, har hun selskab af den mystiske Ben, som Jong-soo erfarer, har et hemmeligt hobby.
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.
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.
