"They should have just stayed home. When a biological bomb is discovered in the air duct of a busy suburban mall, the entire complex is shut down and all those inside are quarantined. At first, there's the novelty of being stuck in a mega mall with free food and gift certificates. But it isn't long before supplies start dwindling and widespread panic surges through the place. Of the thousands trapped, four teens, each with his or her own story, are anxious to escape and help their loved ones survive. But it isn't easy to stay calm when the truth is deliberately kept secret. Marco, Lexi, Ryan, and Shay are about to find out that in desperate times people can change... and not always for the better."