Three years after the zombie virus has gutted the country, a team of everyday heroes must transport the only known survivor of the plague from New York to California, where the last functioning viral lab waits for his blood.

Kristen, a troubled young woman, is captured by the police after burning down a farmhouse and is locked in the North Bend Psychiatric Hospital. Soon, she begins to suspect that the place has a dark secret at its core and she's determined to find out what it is.