This concept horror from Preston DeFrancis tries to combine the shlocky guesswork of a whodunnit in with the craze of Escape Rooms to middling effect. When ex-addict Alexandra (Marcienne Dwyer) accompanies boyfriend Nathan on Slasher Sleepout, the orchestrated haunt becomes menacingly real and the pair must fight for survival. Some of the narrative twists work but the acting is standard C-list horror subpar, the practical effects disappointing, and the scares lacking entirely. The script from DeFrancis and Trysta Bissett is loaded with bromides and jump-to-conclusions dialogue as well as some hare-brained endgame mustache-twirling that comes across as more tasteless and off-putting than brutal and brilliant. (C-)

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