Partygoers, an elderly couple, an impressionistic young man and all the other diverse diners at a Soho restaurant have their worlds shaken up by Lady Pitts (Joan Plowright). A free spirit lubricated by alcohol, Lady Pitts invites the diners to tea at the mansion of her husband (Laurence Olivier). Lady Pitts's drunken chattering elicits a variety of responses in the restaurant -- from feelings of anger and irritation to stirrings of love.