A Fish Called Wanda (1988)

In the heart of London, a scheming quartet hatches the perfect diamond heist, only to be ensnared in a trap. George, the mastermind, brings in stuttering animal lover Ken, seductive con artist Wanda, and her psychotic "brother" Otto, who harbors a violent disdain for the English. As the heist unravels, alliances shift, secrets surface, and Wanda's charms entangle a proper barrister in their treacherous game.