While on a GPS treasure hunt in the Palatinate forest four teenagers come across an old US military radio tower station. Back in the days of the Cold War it was part of a secret military program that produced horrific side effects, but has long since abandoned. Until now, when the station is mysteriously powered up again.

Edi and his family just moved to a new home near the forest. Edi met a mysterious girl who asked him to play with her in a secret place that only the two of them know.