Dr. Mark Crest (Kevin Nealon) has built a teleportation device that uses tactical nuclear weapons to open a wormhole in the space-time continuum. The device is intended to transport some animals eight miles across the desert, but during a test, the wormhole grows out of control and Mark finds himself hurled back in time, to the day before the test took place. It happens again, but when Mark warns his colleagu, Dr. Cleo Lazar, (Terri Hawkes), and the project's military overseer Lt. Col Lester Glade (Ronny Cox) about the time loop, they think he's crazy. The time loop continues, each time returning Mark to a point in time closer to the test, and Mark figures out that someone has sabotaged the device. At first he suspects Julie (Jennifer Copping), a young woman who seduced him on the night before the test. And, he's right - Julie is an eco-terrorist opposed to Mark tampering with nature - but she's not the only saboteur. Glade has his own plans for the device and