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.
The screenplay is based on Wide Boys Never Work, a novel by Robert Westerby.
^ http://ftvdb.bfi.org.uk/sift/title/51326Synopsis
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 gang's 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 don't turn out the way he planned.
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