Ernest est le fantôme le plus nul de l'hôtel. Félix, un jeune vivant va lui apprendre les rudiments de la peur et essayer au passage de récupérer son ex.

In the wake of their parent's separation, three siblings spend the summer in the south of France with their estranged Grandfather. In less than 24 hours, a clash of generations has occurred between the teenagers and the old man. During this turbulent summer, both generations will be transformed by one another.