"Pat and Jen are heroes. After defeating Evil Jen and closing all the portals to the underworld, they have nothing to worry about, no villains to defeat, and no adventures to go on. Awesome, right? Until a mysterious voice tells Jen that she has to go to the underworld to uncover a secret about her past. It is a quest she can only undertake alone. With Jen off to find out the truth and Pat desperate to find Jen, the heroes almost don't notice that...

Dump trucks, fire trucks, and even garbage trucks join in a race through the streets of Trucktown.