In the year 2055, the Chicago-based Time Safari company offers the permission for rich people to hunt dinosaurs in the past via time travel technology. As a precaution against the potential change of the past, the company preys only on the dinosaurs who would otherwise die of natural causes and keeps the clients from stepping off the designated path. Because of the dangers of interfering with the timeline, the company's activities are vocally criticized by Sonia Rand, the developer of the time machine software "TAMI", who feels disappointed for not receiving credit during her work and is worried that some clients may alter the past through their activities.