Intensity
Dean Koontz
 Chyna Shepard is a college student visiting the family of her friend, Laura Templeton, for a long weekend. Chyna, who was abused and neglected by her mother as a child, finds the Templeton house provides something she has yearned: acceptance. This comes to a violent end when Edgler Vess, a serial killer, breaks into the house in the night and methodically kills all of the occupants except Laura and Chyna. Chyna hides from him under her bed and waits until he goes downstairs. She searches the house and finds Laura's father shot and tied to a toilet seat, and the mother stabbed to death in the shower. Chyna encounters Vess on the stairs eating a spider before she sneaks into Laura's room. She finds Laura tied up and raped. Chyna sneaks away, promising to return. Before she can intervene, Vess kills Laura and takes her to his motor home. Chyna hears Laura screaming and runs upstairs intending to attack Vess with a knife. Unaware Laura is dead, Chyna sneaks aboard the motor home and finds her friend's corpse. Before she can escape, Vess drives away. Chyna hides in a back room, planning to escape at the earliest opportunity. When he stops at a gas station, she sneaks out of the motor home, and heads inside the gas station to find a phone. Chyna surreptitiously watches Vess boast to the gas station clerks that he is holding a young girl, Ariel, prisoner in his basement, before he kills them and drives away. Chyna feels compelled to follow Vess and help free the girl. She takes an attendant's car, and follows Vess. Chyna passes Vess while traveling through a state park and crashes her car into a redwood tree. While Vess gets out to investigate, Chyna sneaks on board the motor home. By the time Vess reaches his house, he has discovered that Chyna is on board. Fascinated, he decides not to kill her immediately to see what she will do. Chyna breaks into his house and goes into the basement to find Ariel, locked in a room and catatonic. Before she can free Ariel, Vess attacks Chyna in the kitchen, punching her unconscious before binding her with a chain in the kitchen. He taunts her for a while, revealing details about his past and past crimes. Obsessed with the "intensity" of any particular experience, sensory and existential, Vess styles himself as a "homicidal adventurer", and has killed continually since childhood. He offers to allow Chyna to live if she aids him in mentally torturing Ariel out of her catatonia. Then, Vess leaves for work. Chyna escapes from her chains by breaking away from the table to which she is chained and slamming her chair into a wall. She releases Ariel from her prison. Vess has trained a pack of deadly Dobermann pinschers to guard his property and kill anyone attempting to get in or out. Chyna dresses in Vess's dog-training clothing and sprays ammonia on the dogs to get through the dogs and into the motor home. She and Ariel exit the house, and take a vehicle. Chyna sees a police car on the road, so she pulls over to signal it, only to discover that the driver is Vess, the local "county sheriff". In the ensuing showdown, she rams his police car, soaking him and the highway with gasoline, though this fails to kill him as he escapes his car and uses a shotgun to disable the motor home, causing it to tip over. Chyna and Ariel escape the crippled wreck but Vess catches up to them and knocks Chyna to the ground but Ariel continues on, distracting Vess long enough for Chyna to get a lighter she'd grabbed at the gas station. She uses it to ignite the gas covering Vess and the highway before rolling to safety. She catches up to Ariel and watches as Vess meets his end in the flames. They are then rescued by a passing motorist. A few months later Chyna adopts Ariel, who has begun to speak in small phrases and meets a man who she falls in love with.