London, February 1918. A burglary in Limehouse in the small hours of the morning has escalated into a sinister siege between a band of thieves and the authorities, and a police constable lies dead. Detective Inspector Harvey Marmion and Detective Sergeant Joe Keedy hasten to the scene where attempts at talking the men into surrendering have been met with stony silence. When the door is eventually battered down, Keedy bravely leads the way in. Then...