While dive in a distant Gallic lake, a twosome of YouTubers who specialise in submerged geographic expedition video detect a house submerge in the deep Ethel Waters. What was ab initio a alone determination shortly turn into a incubus when they detect that the house was the scene of flagitious crime. Trapped, with their O militia fall perilously, they recognize the worst is yet to come up: they are not entirely in the house.