Someone in a prison run by a corrupt warden fakes the deaths of convicts to later use them as expendable assassins. A police officer is sent into the prison to gather evidence of the corruption.

Frustrated in his attempts to assassinate Yee, who is an important official in Japanese-ruled Shanghai, Old Wu, who has lost his wife and two sons as well as two women who had attempted to seduce Yee, now recruits Kuang, Mai Tai Tai, and their troupe of drama students from Hong Kong University in yet another attempt to do away with Yee. Mai Tai Tai is chosen to befriend Yee, which she does by posing as the wife of Mak, befriending Yee's wife and her female friends, and then eventually...