While China is traumatized by military cliques during the Warlord Era in the 1920s, Japan has grown into the most powerful foreign national group there, taking over much of Northern Shanghai. Although the city is being torn by international settlements, the upscale cabaret nightclub Casablanca remains a haven for a mishmash of clienteles who hobnob every night till the sun comes up: Chinese entrepreneurs, British officials, Japanese militaries, and spies who desperately seek to overthrow the growing Japanese power in China. Everybody comes to Casablanca for a reason, including the mustachioed entrepreneur Ku and the sultry singsong girl Kiki. Ku is none other than the legendary hero Chen Zhen in incognito, who single-handedly avenged his mentor’s death by killing all the Japanese at a dojo in Hongkou years ago. Although rumor has it that he had been killed by the Japanese, he actually escaped to France to fight side by side with other Chinese laborers in contribution to the Allied war effort. Disguised as a masked warrior at night, Chen now sets out to thwart the imminent Japanese invasion by rescuing as many people as he can from Japan’s “assassination list.” He soon finds himself inextricably enamored with Kiki who is harboring a dangerous secret of her own. When Chen finds out that the Japanese colonel in charge of the Japanese invasion is the son of the Judo master he has killed in the Hongkou dojo, his past inevitably catches up with him, as national pride fueled by personal vendetta guarantees the fiercest final showdown