A man who used to work as a bodyguard now works as a security guard at a construction site due to an incident. The company where he works establishes a new bodyguard division and he then starts to work again there as a novice bodyguard.

Shimazaki Akira lives with his middle school student son. He used to work as a bodyguard, but, due to an incident, he now works as a security guard at a construction site. The private security company where he works establishes a new bodyguard division. Hiding his past as a bodyguard, Shimazaki Akira begins work as a novice bodyguard.