La maison vide

Serge, a young math teacher at an inner city high school, tries to get his students to solve an equation but is disturbed by a phone call. Smart aleck Karima is no whiz at math but comes up with a solution.

Mousse and Louis are young, beautiful, rich and in love. But drugs have invaded their lives. One day, they overdose and Louis dies. Mousse survives, but soon learns she's pregnant. Feeling lost, Mousse runs away to a house far from Paris. Several months later, Louis' brother joins her in her refuge.

Elise lives alone in an apartment on the coast of Brittany. ONe day, on an isolated beach where she regulary goes to swim, she discovers the body of a woman who ha drowned. Who was this woman ?