Meet Hannah Halloran. Wife of Sean, mother of teenage Zac and little Oscar. Their comfortable home is in a suburb of a city unaffected by the deadly flu that’s killed thousands. But Hannah is tense. She’s worried about Zac’s vulnerability miles away at a crowded summer camp. She’s uneasy about Oscar’s boisterous play with the children at his school. Is physical contact wise when an epidemic is coming closer? Hannah fears that their safe little world is about to be blown apart. And she’s right. It’s time to get Zac home – if they can. As the virus traps Hannah and her family in their neighbourhood and then within their own home, supplies of food, water and electricity dwindle. Every day, Hannah has choices to make that will decide whether they live or die. Choices with devastating consequences. Just how far will she go to protect those she loves?