Grégoire Samsa is a solitary young man, a building caretaker, always ready to help everyone, in order to exist. Scorned, even by his adoptive mother, Grégoire will begin an uncontrolled mutation.

Through the form of a journey of initiation, Vortex retraces a young man's return to his roots. Driss fled his past and his family and must, during a single night, face up to the emotions that have held him back all these years.

Pierre is at a high school party with his best friend and secret crush Nikki Marianne, but she is more interested in an older man.