'Fickle thing, memory.' Malcolm discovers how true his words are when he takes his friend Clive to a singles' evening. Clive, a hospital porter masquerading as a doctor, has just been left by his wife, while Malcolm is a confirmed bachelor and "big in imports" - really a market stall trader. In the deserted hotel bar, to the depressing soundtrack of the next-door ballroom, they meet two recent divorcees; upwardly-mobile Julie and cynical, defiant Liz. Malcolm is determined to break down Liz's defences while trying to pair off Clive with Julie. But the women have a few tricks of their own, and Malcolm soon finds that life, like the evening, is full of surprises.