Enter the Invincible Hero

Liu Lung, a martial arts maniac and lone ranger, embarks on a quest to discover the truth behind the death of several villagers, apparently at the hands of ninjas.
In his search they encounter the ruthless boss of a security firm, who intends to deceive and rob their own customers. Liu vows to destroy the gang but is unaware of a dark secret harboured by his opponent about his kung fu past.