Lily, an uptight businesswoman, and Philippe, a French gigolo who eats mushrooms and is bigger than life, are 8 months pregnant. Their therapist suggests that they spend a few days in a remote cabin in nature. When Philippe finds a magic box that swaps souls, their little weekend trip turns into a hilarious adventure. Lily and Philippe have to solve riddle after riddle to get their bodies back and to learn more about their opposite and what they can offer as parents.