In the year that has passed since a meteor collided with the moon, Miranda's friends and neighbors have died, the landscape has frozen, and food has become increasingly scarce. The struggle to survive intensifies when Miranda's father and stepmother arrive with a baby and three strangers in tow. One of the newcomers is Alex Morales, and as Miranda's complicated feelings for him turn to love, his plans for his future thwart their relationship. Then a devastating tornado hits, and Miranda makes a decision that will change their lives forever.