Jason Whiting

Hundreds of years from now, the last surviving humans discover the means of sending consciousness back through time, directly into people in the 21st century. These "travelers" assume the lives of seemingly random people, while secretly working as teams to perform missions in order to save humanity from a terrible future.

A crew on a remote construction site are plagued by a series of bizarre mishaps. As the incidents turn more and more savage, it becomes clear that the sole link to the deadly events - is a 50-ton bulldozer.