Dr. Harrison Parker (Jeff Fahey) is a scientist working at Calgorin Industries who developed the Eden Formula, a chemical that can reproduce organisms and cure various diseases.

The spies, led by James Radcliffe (Tony Todd), accidentally set loose the bloodthirsty tyrannosaur, which breaks its way out of the lab and rampages into the streets of Los Angeles.

Parker and his colleague Rhonda Shapton (Dee Wallace) are in the building when the spies attack and now have to secure the formula while trying to evade Radcliffe and his team, all while the T. rex continues adding to its body count.

[4][5] Scott Weinberg of DVD Talk called the plot "stupidly simple" and described the film as "an amazingly chintzy retread of Aliens mixed with a little Die Hard".

[7] Jon Condit of Dread Central was amused by the film, writing that it was "not a good movie in any way, shape or form", and that he "couldn't help but be in some way marveled by how unapologetically bad this entire production was".