While driving through the south of Belgium, the violoncellist Julien meets the mysterious and gorgeous Sylvia on the road and he immediately has a crush on her. They move together to his huge house and Julien builds a greenhouse for Sylvia in the field of his real state, where becomes her favorite place. One day, Sylvia has a strange behavior with Julien and asks him to stay alone at home. When Julien leaves the house, she goes to a construction nearby her property and brings to her house the daredevil biker Patrick that is working in the building, playing erotic games with him.

Paul, is an ordinary man who divides his life between his shipbuilding company, his wife Elise and their daughter Mia. During a sea trip, Paul finds himself confronted with a strange, unexplained meteorological phenomenon. From then on, Paul shrinks inexorably, without science being able to explain why or be of any help to him. When, by accident, he finds himself a prisoner in his own cellar, and while he is only a few centimeters tall, he will have to fight to survive in this banal environment that has become perilous. During this experience, Paul will find himself confronted with himself, with his humanity, and will try to answer the great questions of existence.