A superhero drama about Soo-yeol who has lived his whole life as a materialistic police detective, but changes into a champion for justice and fights against police corruption when a hidden persona called "K" awakens inside him.

Masha is an energetic three-year-old who can’t seem to keep herself out of trouble. Bear is a warm, fatherly figure that does his best to guide his friend and keep her from harm, often ending up the unintended victim of her misadventures.