In the near future, time travel will be amazing and unpredictable reality. For money, wealthy travelers can awaken their dormant instincts of hunters by booking prehistoric safari to hunt real live dinosaurs. There are only three important rules that can not be broken: do not change anything in the past; do not leave anything out there; and most importantly - do not take anything with you. The slightest change could lead to the global change of evolution in ways that are hard to imagine.