The Undead Task Force (a branch of the LAPD, formed when the San Fernando Valley was overtaken by zombies, werewolves and vampires) must continue to get rid of the monsters and contain them in the valley. While this occurs, scientists work to find out what caused the outbreak. A brave camera crew comes along for the ride.

白雪是一个正处在青春叛逆期的女孩，她不满父亲格兰特（艾瑞克•罗伯特斯 Eric Roberts 饰）和继母伊芙（玛瑞恩•麦柯米克 Maureen McCormick 饰）的婚姻，在家里处处与他们作对，在外逃课、飙车、惹祸，令人头痛。在伊芙的挑唆下，格兰特忍无可忍，将白雪强制送入“四周忠诚训练营”，一个旨在改造所有问题少年的活动。白雪被逼无奈，只得在烈日酷暑和教官呵斥怒骂下进行各种各样高强度的训练。
与此同时，心怀叵测的伊芙时刻图谋吞并格兰特的家产，为此，她必须除掉排在她前面法定继承人白雪。白雪不仅要想方设法保护自己，还要彻底挫败狠心继母的阴谋……