A new born girl is placed in a coin operated locker in the subway station. The girl is raised by a mother (Kim Hye-Soo) who is the boss for a loan shark group. Later, when the girl has grown into a teen, she carries out missions given to her by her mother.
In 1938, a girl, Joo-Ran (Park Bo-Young), is transferred to a boarding school in Keijyo (old name of Seoul). Joo-Ran learns of another student with the same name and she tries to figure out the hidden secret of the boarding school.
Meisuke Nueno (Ryuhei Maruyama) is the homeroom teacher of a 2nd grade 3 class in high school. He is referred to as Nube. He sometimes carries himself as an idiot, but he does care about his students a lot. He also has a hidden side. Meisuke Nueno has a demon's hand. He solves monstrous case and fights desperately to save students from monsters