Intensity.

Chyna Shepherd is a twenty-six-year-old psychology student who survived an extremely troubled past. While visiting Laura Templeton's house, a farm in the Napa Valley. A serial killer named Edgler Foreman Vess breaks into the house, killing Laura and her parents. Chyna survives, but she learns of Vess's captive: a girl, just as innocent as Chyna, trapped in Vess's home far from the Napa Valley.