After witnessing the burning of Los Angeles, Madison, Travis, Daniel and their grieving families board the 'Abigail', still unaware of the true breadth and depth of the apocalypse that surrounds them. But as Operation Cobalt goes into full effect and the military bombs the Southland to cleanse it of the Infected, the Dead are driven toward the sea. As the group head for ports unknown, they will discover that the water may be no safer than land.