佩妮（苏珊·斯塔丝伯格 Susan Strasberg 饰）的父母在她很小的时候就离婚了，一直以来，佩妮都跟着母亲生活。一场意外夺走了母亲的生命，于是，孤苦无依的佩妮接受了父亲的邀请，前去和父亲以及继母一起生活。然而到了父亲家，佩妮却发现在那里的只有继母一人，虽然这个女人表现得非常的和善与热情，但佩妮还是对她充满了戒备。
继母家里发生的各种诡异的事情，以及始终下落不明的父亲让佩妮的神经越来越紧张，渐渐地，她开始分不清，在这里经历的一切，究竟是不是自己的幻觉。很显然，继母也希望佩妮产生这让的自我怀疑。
Michael's health club is beseiged with a series of terrible murders involving killer saunas and other grisly devices. Michael's wife killed herself a while before and her brother holds Michael responsible. Michael needs to stop the bloodshed before he loses all of his clients.
Jake Cullen (Bill Kerr) lives with his grandson in the Australian outback when a massive razorback boar attacks him, destroying his house and killing his grandson. He is accused of murder and his dignity is destroyed.
Two years later, a wildlife reporter, Beth Winters, journeys to the outback to document the hunting of Australian wildlife to be used as animal food, processed in a large factory, but she is attacked by two deranged locals, Benny and Dicko, who leave her to be killed by the beast. Her husband, Carl, goes in search of her, and aids Jake Cullen and his young associate, Sarah Cameron, in hunting for the razorback responsible for her death.
As they search for the creature, Benny and Dicko worry that they may be associated with the murder of Beth Winters, so they attack Cullen and leave him to be killed by the boar. Vowing revenge for his wife and his friend, Carl finds Benny and lowers him into a mineshaft, presumably killing him, and finds Dicko in the factory. Before he can kill him, the razorback surges and mauls Dicko to death before chasing after Carl and Sarah, where they face off inside the processing factory. Carl lures the Boar (having speared it with a pole) into pursuing him down a conveyor belt, at the end of which is a large industrial fan. Not able to stop itself, the boar falls to its demise onto the blade/fins killing it, while Carl rescues Sarah.
