A gunman always ranks high on a triad society roster, Probably it sis because they resolve difficult issues with a quick gunshot, But who takes care of the mess afterwards? It is the "Button Man", who cleans up the crime scene, get rid of the body, and eliminate all evidence.

Button Man’s assistant "Doctor" was killed when he messed up an organ trading deal. Losing his ambition, Button Man buried his best friends and wanted to leave forever after he trained his successor. He was shocked to find out an affair between his student and his woman, and his student’s first job was to get rid of his body! Button Man couldn’t escape. On the contrary, he was just stepping deeper and deeper…

In real life, Button Man has a secret second identity. His real character was eventually exposed…