What's hiding in room number 7? Benjamin's parents decide to buy an old inn by the sea. Even if he is a little surprised, the boy adapts well to the situation. While waiting for the rooms to welcome guests, Ben chooses to sleep alone on the guest floor, where there is room number 7, unused for a long time, and about which all sorts of rumors are circulating. It is said that in the past, a little girl named Sophie lived locked up in this room and that, even after her death, she never left it. What if the legend was true? A tombstone on the grounds of the inn, a rag doll that appears on the edge of the window, musical notes from room number 7... nothing to reassure Ben.