As Wendy and her stepfather, Whistler, step out into the night after viewing his new scientific film, she senses something is waiting in the dark. Suddenly without warning, a supersonic wave of air blasts directly into them. As Wendy drops to the ground, Whistler falls to his knees. Disoriented, he cradles Wendy until rescuers arrive. As Wendy fights for her life, her doctors, her best friend, and Whistler learn that just prior to the event, she took...