Winter 1915, Northern France, a French trench is shelled, all the soldiers are buried leaving only one survivor. Underground, he manages to extract himself and crawl into a hole leading to a tunnel. Then begins a journey that will take our soldier to the mysterious village of Gliwensbourg, in 1925...

The soldier arrives, amnesiac, in the middle of a hunt for loot between clans living recluse in the marshes, a marsh hit for a decade by a curse. The jackpot hidden in a mine during the war is their ticket out, but the threatening presence of mysterious creatures makes underground expeditions perilous...

As a problem never comes alone, a State agent arrives in Gliwensbourg to shed light on the finances of the County in the midst of the national policy of the economic recovery effort. The noose is tightening around these not very popular people. Lala, the Dean and shaman of the "melons" community, then warns the soldier against this announced agent of the State whose destiny is linked to his. He must absolutely discover the mission entrusted to him by the Djinns, a countdown has started...