An illegal immigrant from Mainland China sneaks into the corrupt British-colonized Hong Kong in 1963, transforming himself into a ruthless drug lord.

Ho Sau, an undercover agent, has been working with Yau, a drug lord, for years, but his job and family are in trouble.

After being released from hospital after a surfing accident, Sean meets a girl at a party and falls in love. She draws him into her strange world and confesses that…