Immoral agoraphobic realtor Scott Crane orders the arson of a house so he can collect the insurance money, but two children are unexpectedly caught in the blaze and the arsonist, Rick, demands payment to ensure that he won't report Scott, but he refuses. That night, Scott's thermostat continues to rise and his stove mysteriously activates while only hot water emerges from his taps. He suspects that Rick is harassing him - until he catches him dying in the attempt to sabotage his circuit-breaker, and the attacks of causing his home to heat up continue.