Marie and Eric, thirty-somethings who have been a couple since high school, are signing the purchase contract for their first apartment when Marie is seized by a dizzying doubt. When she meets a handsome, dark-haired man, her decision is precipitated: she leaves Eric to dive into the deep end of pleasure and freedom. But above all, she's going to eat the bottom of the pool... And discover a world without pity: at her age, celibacy is quickly perceived as a suspect taint. Enlightened by new friendships, Marie will learn to see her celibacy as an opportunity from which she can emerge stronger, and finally ready to be happy.