Pau (16) and Alex (10) are waiting for the arrival of Julia (18), their half-sister. After years of not seeing each other, Julia is moving in with them and their father in common.
Alone, with their father in Berlin on a business trip, Pau begins to feel a strange fascination with his half-sister. An uncontrollable sexual desire that consumes him in an internal battle between his most passionate impulses and a morality that torments and represses him.
Secretly looking for Julia’s contact, Pau will begin to secretly masturbate next to anything she has touched. A hiden but exciting consolation that Julia will eventually discover.