Stuck in a terrible February snow storm, two men are at odds over what to do with a peculiar stranger taking refuge in their home.

Sara Kitcher delivers early dismissal passes during period six. And she's good at it - one of the best pass runners Westlands High has ever seen. When she discovers an anomaly in Westland's attendance records, she decides to investigate. Why has nobody, in the entire history of the school, been dismissed from room 277? When Sara's investigation becomes a rescue effort, she must complete the highest-stakes pass-running challenge the world has ever known. Success will rid Westlands of a malevolence that has occupied the school since its first graduation. Failure will bring infinite pain, destruction of her soul, and a difficult lesson in factoring polynomials.