One tiny change... and the future is history.In the year 2055, a technology has been invented that enables people to go back in time to hunt dinosaurs. When one such expedition to the Prehistoric past unwittingly makes a fatal mistake it dramatically impacts the course of evolution, setting off waves of destruction that ripple toward the modern world and unleashing an army of fearsome creatures that never should have existed. Two scientists race against time to fix the catastrophic error while their world collapses around them and every minute brings the human race closer to extinction.