Seefeld

Bernese Oberland, in the year 1941. Captain Felix Weidlin must search for the optimal location for the construction of a secret general's bunker in the Bernese Alps on behalf of General Henri Guisan. In an abandoned alpine hut in the Seefeld area, he discovers an old diary with mysterious entries. During a second visit, he and a geologist break into a dilapidated underground facility that no one knows about. The geologist discovers that the water seeping from the buried facility as a small stream is so-called heavy water, which does not occur in nature in such abundance. And that, especially in these times, possesses a sinister explosive power. More people appear and get involved - the plan takes a disturbing turn.