An old, eerie villa, located somewhere on the edge of the beach, inhabited by a mysterious elderly lady: Charlotte. Her 11-year-old great-nephew Luca visits her. Luca immediately notices that something is wrong. He is a special child and feels more than others ... Step by step, Luca finds out more and more about a mysterious, unknown otherworld in which four young people are trapped. At the same time, the four, Leonie, Elif, Yussuf and David, are looking for a way out: in an empty world in which there is neither time nor day and night - without a mobile phone, without external contact. In doing so, they have to find each other across all differences and understand what happened. Your great hope is Luca. Can Luca be the key and solve the mystery? Can the four of them get in touch with him? Is there a way back from the other world into the real world?