Tired of walking the crowded streets of Tokyo while looking for an apartment during the Olympic games, English industrialist Sir William Rutland (Cary Grant) is rescued when the attractive and kind-hearted Christine Eaton (Samantha Eggar) offers to share her apartment until he can find something more suitable. However, what Rutland finds is another roommate for Christine's miniscule apartment, American Olympic athlete Steve Davis (Jim Hutton). As the crowded accommodations prove too difficult for the threesome, Christine is especially upset when her engagement to a British Embassy official is broken after he misconstrues the nature of her involvement in the triangle.