Dr. Mark Downing, a father of two, struggles to balance his work and family life. His second born, Bailey Downing, is heading to a summer music camp, against his wishes.

As Landon's condition worsens, Mark debates administering the experimental cure he has been working on, which could have deadly side effects.

Officer Kevin Derringer passes a convenience store in the midst of an outbreak, forcing his police tactics to kick in.

When the zombie outbreak hits the school, Jaden and Marie fight to reach their mothers and survive the encroaching apocalypse.