Marnie Young, an executive assistant in San Diego, is a sweet girl who wouldn't hurt a fly. She's also super lonely. But one night, without warning, Marnie has a violent seizure; co-workers recoil in horror as she writhes on the floor. Two days later, Marnie wakes up in a hospital room. As her vision comes into focus, she sees 17 doctors and nurses dead on the floor, blood splattered everywhere. Soon she discovers the shocking truth: Marnie...