Protagonist: Ling Feng (codenamed "Dragon Ya") was once the captain and chief instructor of China's most mysterious special forces "Hidden Dragon". His strength is unfathomable and he is proficient in various military skills, combat, firearms, stealth, and tactical command. Due to a major change (possibly a mission failure, the sacrifice of a comrade, being framed, etc.), He was frustrated or had no choice but to leave in hiding and return to ordinary urban life.
