Fire Rains From Above... A Fracture Forms... Jack Walker and the other survivors continue their search for others. Unbeknownst to them, the night runners have initiated their own gathering and, with Michael's leadership, they are adapting. The survivors learn about some of these adaptations and strive to stay one step ahead. Their continued existence depends on it. Factors enter the picture which could fracture both groups. Jack fights for the survival of humankind while Michael must do the same for the night runners. Heading off to search for other remnants of humanity, Jack is unaware of the danger that lurks within the heart of the sanctuary - an act of kindness, seemingly so small, that could bring about the destruction of all he holds dear. While both sides fight for their very survival, an infatuation arises that could destroy both of them. The smallest of tremors Can start an avalanche...