It follows a hitman who finds himself targeted by his ex-employers after he falls in love with a single mother and quits his job.

[7] Ji Hyeong-do works for a metal fabrication company which is a front for their assassination trade.

Eventually, Hyeong-Do's crisis makes him end up in a situation in which he becomes disloyal to the company and suddenly finds himself to become the target of his former employees.

Learning this, Hyeong-go and Mi-Yeon leave for a safe place to start a new life, but Kwon and his colleagues catch up to him and kill Mi-Yeon in front of him and shoots Hyeong-Do, who survives and leaves for his office where he intends to finish them and a shootout ensues, in which Hyeong-Do finishes the assassins and Kwon.

It was sold to 55 countries including Japan, China, Thailand in Asia, as well as France, Switzerland, Austria, the Netherlands and Belgium in Europe.