Hôpital souterrain (2002)

During a weekend on the small island of Roz Ven, Marine, an eight-year-old girl who had come with her parents, disappeared while the three of them were visiting a mysterious underground museum. The police are immediately put in charge of the investigation, but it stalls: despite numerous hypotheses, none of them seems to fit and the disappearance remains unexplained.

Unfortunately the movie Hôpital souterrain is not yet available on HBO Max.