As she nears the end of her career as a lead diver, Abby Marsh is determined to make this one count. She and her team have been called out to make a final plunge to La Fosse Dionne, a fountain in Tonnerre, France, with a bottom that has yet to be discovered. The funding for the job comes in the form of Dr. Mark Golus, a strange man with too much money to spend an odd obsession with the fountain. From the start, there's something strange about the...