Philip Turner, chief architect of Feltonly New Town, is disillusioned in the realization of what he has destroyed in planning and developing the town's sterile, inhuman tower and office blocks. He decides to plan nothing at all, to opt for spontaneity even in his private life. Margery, wife of his old friend, is willing to become his mistress, but Philip demurs. 'Can't you see you are just as ruthlessly planning spontaneity?' says his wife.