Once a creature is extinct, it's gone forever, right? Not any more. The physicist mother of Kizzy and Fraser Rye has invented an amazing time machine that can travel back into the past, snatch a plant or animal now extinct, and bring it back into the present. It is a wonderful achievement and an astounding scientific breakthrough. But the machine, "Rye's Apparatus," also has horrifying potential. Suddenly Kizzy and Fraser find themselves caught up in a terrifying spiral of events that eventually leads to a monstrous demand from a sinister and violent organization.