Selina wakes up to a terrible hangover and her annoying baby sister’s birthday party. Soon, however, those problems are overshadowed as a living corpse staggers into the garden and begins attacking the children.

Meanwhile, not far away, Dan realizes the danger isn’t over. He heads out once more to try and stop the infection from spreading further.With law enforcement proving a poor help, the teenagers reluctantly team up as a zombie-chasing duo. Facing grueling odds, they track down the infected in an attempt to stop them from finding new prey and spreading the virus....