Chen Yu, a special soldier who once made mercenaries all over the world fear him, and his teammates were performing a mission. Due to intelligence leakage, all his teammates except himself were sacrificed in the mission. As the captain, Chen Yu could not accept the reality and suffered from post-war syndrome, so he retired from the army and wandered around the city all day long. Suddenly one night after drinking in the bar, he heard a gunshot on the way home. As a former soldier, he had no hesitation in running towards the place where the gunshot was heard...
