在阿尔卑斯山的一个滑雪胜地，一名季节性工人死于大篷车火灾后，一名来自里昂的宪兵，原本是该度假区的宪兵，与一名心灰意冷的宪兵一起领导调查。

Six months after the flooding of the valley much of the town's population have been evacuated, though some remain hoping to find loved ones taken by The Horde. An expert, Richard Berg, arrives tasked with finding the cause of the flood.