Milena and Lucie, two work colleagues, take advantage of a sunny Sunday to go swimming at the Cergy-Pontoise leisure park. Their meeting with an intrusive prevention officer puts a strain on their budding friendship.

After a bad breakup, a college-aged Parisian moves into her father's flat only to discover that he is living with his new girlfriend - a young woman her age.

Two languorous summer days, two thorny tales of romantic misunderstanding: in part one, two girlfriends head to the Cergy leisure park for a day of swimming and equally vigorous flirtation; in the second, a Norwegian exchange student finds herself the target of unwanted attention from two would-be suitors.