The boy is Sam Walters (Patrick Holt). The girl is Susie Bates (Honor Blackman). The bike is one of several used by a British cycling club. Boy and girl have fun peddling about the countryside until the girl's pretty head is turned by David Howarth (John McCallum), a wealthy young man with a snazzy sportscar. When David joins the cyclers, Susie glows and Sam glowers. Set in Yorkshire, the film is pleasant to look at but difficult to understand (at least for those not accustomed to regional British accents). The presence of sex symbol Diana Dors in the cast enabled 'A Boy, a Girl and a Bike' to secure good bookings in the U.S.