When Sun Yi was 16 years old, he accidentally injured another person and died because of a girl. The dead have a black background. Forced to have no choice but to smuggle Sun Yi out of the country, his parents had no choice but to send him abroad. By chance, Sun Yi became one of the international mercenaries. A mysterious man found Sun Yi and promised to make up for his mistakes. Sun Yi went through a series of twists and turns in order to return to his hometown...