Thriller based on the short story by Ray Bradbury. In 2055, in Chicago, a company specialised in time travel and owned by the powerful and wealthy Charles Hatton (Ben Kingsley) organises safaris for tycoons in the prehistoric era. The team is leaded by Dr. Travis Ryer (Edward Burns) and the jump is programmed by a computer. However, when something is changed in the past, the time waves affect the present and Travis and his crew, with the support of the inventor of the computer, Sonia Rand (Catherine McCormack), try to find a way to fix the problem.