A criminal is killed at a dodgy night club owned by Tim Farrell (Umberto Scalli) with Vincent (Lenny Bruce) as his murderous henchman (who is very handy with a knife).
A Federal agent is sent in to investigate and he discovers the club is a front for a diamond smuggling racket. Vincent meanwhile has plans to replace his boss permanently...
This is pretty grim stuff, badly acted and plotted. The cheese factor is high but when a dog (which doesn't do much other than lie around) outacts most of the humans then you know things are bad...
The sheer ridiculousness can be compelling at times but "so bad it's good" can only take you so far.