In the face of an impending natural disaster that threatens to overwhelm mankind, William Culver, a 12-year old autistic boy, disappears from home Whilst his father, Jack Culver, the scientist heading the team responsible for predicting the disaster, is torn between his duty to his family and his duty to mankind, Billy's mother, Martha, sets off on a quest that takes her across America in search of her son What none of them knows is that evil and powerful men on both sides of the world's main religious divide are so busy plotting each other's and, ultimately, man's downfall that they fail to heed the warning about the far greater threat until it's too late