Al Capone's Valentine's Day surprise for the rival Bugs Moran gang in 1929 Chicago.
Chicago February 14th 1929. Al Capone finally establishes himself as the city's boss of organised crime. In a north-side garage his hoods, dressed as policemen, surprise and mow down with machine-guns the key members of Bugs Moran's rival gang. The film traces the history of the incident, and the lives affected and in some cases ended by it.
- Dramatization of the Chicago mob wars in the 1920's between Al Capone (Jason Robards) and "Bugs" Moran (Ralph Meeker) for control of the multi-million dollar rackets which culminated in the notorious gangland slaughter on February 14th, 1929: St. Valentine's Day.