Before Eddie Constantine became a French pop icon as the slapdash "Lemmy Caution," he played Johnny, a straightforward London taxi driver. When his new taxi is smashed and he needs a big loan, he agrees to a five-minute marriage to Malou, a naive French girl, so she can become a British citizen. As planned, the two part after the nuptials, not realizing that this has all been rigged as a recruiting scheme by Nick (Herbert Lom), the boss of a Soho prostitution ring. Malou learns of Nick's plans for her future and tries to escape but is drugged and locked up. With help from the head "girl," Vicki (Diana Dors), Johnny learns of Malou's peril, and hatches a plan to free her. This dark action thriller has a few clever twists, and Dors is gorgeous, but her fans may be disappointed at the smallness of her role.