Anna and Matheo's relationship is all but perfect when she meets Malik. Anna is confused about her sexuality and Malik's commitment issues are harboured by loyalty. La théorie du y is about how they find their way to live life through experiences, friendship and love.

• Caroline Taillet
• Gaspard Rozenwajn
• Léone François-Janssens
• Violette de Leu de Cecil
• Salim Talbi
• Ophélie Honoré
• Colin Javaux
• Nancy Nkusi