New Yorker Ben Phillips and mysterious Léo Hoffmann are strangers who are summoned to Paris by a mutual acquaintance. Upon arrival, they meet and soon find themselves tangled in a complex mystery.

Marco Mazzetti, a driving instructor, lives with his wife Irène and their young son. After a series of nauseous dizzy spells he goes to the doctor and discovers that he is four-months pregnant. Marco then becomes internationally famous.