In the final book of the series, we go back to where it all started: Alex & Mickey in Tucson. With temperatures still falling, the survivors are forced to decide what to do with a rapist amongst them. But when Alex takes unilateral action, he risks his tenuous hold on the town. Leaving the town to stew over his actions, Alex decides to take a trip down to the impact site to see it for himself. Things go sideways when he finds he is not alone...