Soho Incident

Soho Incident, released in the United States as Spin a Dark Web, is a 1956 British film noir directed by Vernon Sewell starring Faith Domergue and Lee Patterson.

Jim Bankley Patterson a Canadian veteran living in London, is trying to succeed as a prizefighter, without much luck. He falls in love with Bella Francesi Domergue, sister of local Sicilian mob leader Rico Francesi Benson, and she soon draws him into the gangs activities. When he finds himself being drawn into a murder plot, he finally realizes that his lover is only using him, and determines to escape the gang but things dont turn out the way he planned.

Source: Wikipedia