After having found and successfully rescued his ex-wife from the diseased Summit City, Rhys drags himself to where he should be meeting his son and discovers he isn't there.Rhys clings to hope as he and his ex-wife set off on what they believe to be their boy's trail. With just enough breadcrumbs to keep them going, they follow the path of their son and his protector in a race against both the spread of The Alpha Plague, and a crazed psychopath hell...