Steamy chemistry, an instant pregnancy, and a full-blown disaster serve as the background for the relationship between Audrey ("a woman who smells extraordinarily good") and Frank ("a robust lover").
Audrey has to face reality and her new roommate: Frank. She introduces him to her brother, Patrick, who makes life royally hard for them. Frank reconnects with Dave, an old school friend, who has turned into a charming bastard.
Audrey's hormones cause her to experience waves of sexual arousal and sadness, as well as a host of other worries. Frank has difficulty getting advertising contracts. Audrey meets an old flame by chance.
Living in the Magdalen Islands, Audrey's parents visit her; their first meeting with Frank is not ideal. Other problems arise in Audrey's health, complicating her pregnancy and creating stress for the couple.
Audrey and Frank plan their wedding while Frank prepares a surprise party for Audrey's birthday. Frank is fired by his bosses and he begins to look for a job in Montreal.
Audrey, who is very far into pregnancy, picks up Frank at the airport and informs him that she has invited an old friend to be her Maid of Honor. Frank decides to ask Patrick to be his Best Man.