A young woman, Ida, has disappeared without a trace. In an empty apartment in Copenhagen, Sander is kept locked up. Here he is voluntarily filmed and interrogated by two men; Ida's father and brother. It turns out that Ida, long before her disappearance, lived a secluded life with Sander, isolated from the community – in the middle of the city. But Sander does not tell the whole truth.
Four children become friends during the summer holidays, and out of sight of the adults they discover they have hidden powers. While exploring their newfound abilities in the nearby forests and playgrounds, their innocent play takes a dark turn and strange things begin to happen.