Mai Saotome is a member of a private police. She accepts a job which was to protect a son of a millionaire as security guard. However, it was only a pretext. Mai and her partner, Takayama, starts researching on his father's giant company called Dibero secretly.
During the investigation, Takayama goes missing. On her own, Mai makes a move on finding her partner and find the truth about Dibero's secret experiments. However, her security is also threatened...