Su Yin, a hired professional killer, failed to grab a kill during a mission and was kidnapped by Mr. Ye of the killer organization. He was forced to join the "killer training camp". After completing the training, he had to work in the organization for three years before he could take a year off. During the days in the killer training camp, Su Yin, a straight man, was slowly won over by Mr. Ye. At the same time, he also made friends with a group of brothers who shared life and death, and harvested friendship and love together.
Purpose: Learn to work as a team when encountering difficulties, and be united and friendly among friends.