动物园准备开放，聘请一班实习生到访实习，没想到一种神秘病毒在动物园内开始蔓延爆发，全动物园的动物因而变成噬血活尸，成了真正的尸乐园，现在园区内的幸存者除了得想办法逃出生天外，还必须阻止这群饥肠辘辘的动物活尸走出园区……

Andre, recovering from a recent accident, agrees to help his friend Robert by taking over a house sitting job at a creepy home nestled in the hills above Los Angeles. As night comes, the house reveals its insidious nature as Andre begins hearing ominous sounds and experiencing strange occurrences throughout the house that lead him to believe he is not alone, and that someone, or something is in the house with him.