Disaster comes in threes, they say. The first disaster strikes the United States when terrorists release a deadly plague on the East Coast. Despite the government's efforts to contain it, the plague spreads rapidly, and Mercy Johnson fears it will soon reach Chicago.
Alone and single, Mercy doesn't know what to do. On the verge of panic, she gets an unexpected phone call from Noah McKnight, the new hunk at work. Noah invites Mercy to join him on an outing to try and forget the danger threatening Chicago. Together, they find a secluded forest retreat where a shared loaf of bread and jug of wine soon lead to passionate lovemaking. Just as they are about to consummate their relationship, an earthquake rocks the city.
Neither one wants to wait in Chicago for the third disaster to strike. They decide to flee to a secluded cabin Noah owns in the Kentucky woods. Together they head south, just one step ahead of a volcanic eruption in Yellowstone Park that has triggered a new ice age.
Caught in a raging blizzard, Mercy and Noah find their humanity tested as they are called upon to help other refugees in need. Meanwhile, Mercy begins to suspect that her new lover has a secret. He frightens her with his wild talk about communicating with Mother Earth, who has blown her top over the human abuse of her world, but she can’t deny that he seems to possess superhuman abilities.
As they near their final destination, Noah fights to win Mercy’s love and trust, the love and trust he needs to save humanity. As he binds her to him with their shared erotic passion, he takes her on an epic journey to save the Earth from ultimate disaster.