In Hong Kong, Circa 1940s, World War II, private detective Yoyo and friend Inspector Teddy Robin join a resistance group during the Japanese occupation. They aim to steal back the formula to the atomic bomb from a war traitor and transfer it to an American before the formula ends up in the Japanese emperor’s hands.
An assassin called Filthy Harry is hired by a shady figure and charged with killing the heroes. The men are framed twice for different robberies by King Kong’s new girlfriend, nearly committed to a mental hospital by their devious boss, and forced to battle Filthy Harry’s weaponry-laden robot while covered with time bombs.
Chan Wing Yan, a young police officer, has been sent undercover as a mole in the local mafia. Lau Kin Ming, a young mafia member, infiltrates the police force. Years later, their older counterparts, Chen Wing Yan and Inspector Lau Kin Ming, respectively, race against time to expose the mole within their midst.
When the future empress Wu Zetian’s two courtiers die in a mysterious fire, she gets Di Renjie, a former detective and rebel, released from prison to solve the mystery of the fire.
