Beegie is riding the bus when the quake hits. The teenager was heading back to her unhappy foster home, but then she's thrown into a broken world. Roads crumble, storefronts shatter and people run wild. Dessa, a single mom, is enjoying a rare night out when it strikes. Cell towers are down, so without even knowing if her three-year-old daughter is dead or alive, she races to get back across town. As danger escalates in the chaotic streets, Beegie and Dessa meet by a twist of fate. The two form a fragile partnership, relying on each other in ways they never thought possible, and learn who they really are when there's only one goal: just get home.