In this crime drama, a criminal mastermind and his gang plan to rob the Bank of Belgium during the Brussels Exposition as the roof of the bank is being repaired. Included in his gang are a woman, haunted by wartime memories, who loves money, her assistant, and a man pretending to be a construction worker who will help them get in. The woman owns a floating nightclub, and when she refuses to sell it to a gangster named "The Bug" real trouble ensues for the would-be crooks. ~ Sandra Brennan, All Movie Guide