Cao Nan appears to be an art dealer, but in fact he is more than a notorious robber who has been successful in avoiding being caught by the police. Lui is one of the tough police officers who has been chasing him. But he soon realizes the bitter reality that the usual police strategy are too futile to put these armed thieves to jail. Extreme crime requires extreme justice, even if it means crossing his morality judgement. To Shing-bong, an ex-con desperate to leave his criminal past behind, agrees to be Lui’s informant in exchange for a fresh start with his girlfriend Yin Bing. But little does he know what hellish circumstances he is throwing himself into.