Re-elected to the House of Commons, Labour Party member Johnnie Byrne suffers two setbacks: he fails to receive a Cabinet post, and his wife, a Communist, leaves him. The professional failure disturbs Johnnie and he is persuaded to join a left-wing splinter group bent on harassing the prime minister. One evening, Johnnie's neighbour, who is in love with him, takes him to a party where he meets model Pauline. After a few dates, Johnnie is desperately in love with her and fails to appear in Parliament on the day he is scheduled to ask a crucial question to discredit the government. Pauline decides that marrying a man twice her age is too great a risk, and leaves London. Johnnie is then summoned to a meeting of his constituents who attack him for his neglect. Failing to win back Pauline, Johnnie receives a surprise offer from his wife suggesting they try again. Johnnie is inclined to accept her offer, but the prime minister offers him a Cabinet post with the stipulation that he remain apa