After finishing a late night business deal, Tom Weaver (Grayson McCouch) arrives at section E5 of the underground parking garage<insert comma>, only to discover his car won't start. Worse yet, the elevators are shut down and every stairwell has been locked. Trapped in the bowels of the garage, Tom realizes he's not alone. Something else is down here. Watching....waiting.

A monstrous 6000-lb. truck whose driver sits hidden behind a veil of tinted glass. A lethal killer with only one agenda: Not letting Tom get out alive. Over the next six hours, a terrifying game of cat and mouse ensues, testing Tom's will to survive and rattling his sanity. He must outwit his pursuer while trying to figure out who wants him dead: Has his business partner Gavin (Adrian Paul) turned on him? As he fights his way to the surface, discovering horrifying new clues on each level of the garage, <insert space>Tom realizes the truck driver is playing for keeps. Either he outsmarts the mysterious killer behind the wheel...or he won't live to see the light of day.
 
Throttle is an paranoid suspense thriller that turns an everyday situation into a terrifying nightmare. Throttle is also known as E5 and No Way Up.