After a harrowing escape from a battlefield of warring camps, Lance and Cass have reunited their friends and family. They've taken refuge in The Light, possibly the only building left in the world with electricity.But their problems have just begun.Each night, creatures ascend from Baltimore's sewers, swarming the building and testing the defenses for weaknesses. These aren't the monstrosities Lance and Cass first encountered years earlier-they've...