Oscar Lewenstein, director of Beatles films 'A Hard Day's Night' and 'Help!', directs this madcap black and white sex comedy set in late 1960 swinging London. Michael Crawford is Colin, an awkward and naive teacher who shares a flat with smooth-talking womaniser Tolen (Ray Brooks). Keen to capitalise on the sexual revolution occurring around him, Colin asks Tolen for some advice about how to seduce women. His first port of call is to get himself a new, bigger bed; and while he and his other flatmate, Tom (Donal Donnelly) are procuring one, they meet Nancy (Rita Tushingham), an innocent country girl who agrees to come along with them for the ride. Things are looking up for Colin... until he gets Nancy back to the flat, where she meets the irresistible Tolen and falls under his spell. Can Colin get 'the knack' in time to beat Tolen at his own game?