The 20s. In a seaside resort where everybody is bored, Albert Marvuglia, a slightly shabby conjurer, makes Marta, the wife of the wealthy bourgeois Charles Moufflet, disappear, who takes advantage of this tour to escape for good.
In the 60s, in the heart of a village, Robert lives with his mother Odette. About fifty, balding, paunchy, Robert spends most of his time locked in the garage where he tries to develop a teleport machine. Robert will try to teleport himself, but a fly is stuck in the machine, and the scientific apprentice will gradually turn into a giant insect. Robert will little by little dehumanize to become a beast able to climb the wall, pushed by an insatiable search for food.