Seventh-grader Molly has always been an outsider, even at New York City's elite Metropolitan Institute of Science and Technology, but that changes when she is recruited to join the Omegas, a secret group that polices and protects zombies.

While helping the Omega team track down the identity of the original thirteen zombies in New York City, Molly tries to keep her mother's secret and uncovers a sinister plan of the undead.