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AboutaweekaftertheWoodsfamilymoveintoXaosHouse,theirdaughterElliegoesmissingduringapowercut.Ellie'smotherKeirainvestigatesandfindsthatthewallshavestrangesymbolsengravedintothem.AfteranumberofterrifyingsupernaturalexperiencesshecomestotheconclusionthatthehousetookEllie.ShediscoversthataphysicistandoccultistcalledJohnFetherston,whowasobsessedwithfindingthe11thdimension,builtthehouseandengravedsinisterequationsonthe10stepsleadingintothecellar.Finally,Keiramustbattlewiththeuniverse’smostancientevil,orloseherfamily’ssoulsforever.