A mysterious racing/blasting video arcade game Grunkle Stan bought sends Dipper, Mabel, Soos & Wendy into the world of Motorcity? Where they must team up with the Burners to survive dangerous challenges? But the new group carries a mysterious book exhibiting untold magical energy readouts which Kane is after. It's a Gravity Falls & Motorcity CROSSOVER mystery in the making.

After being dropped into the distant town of Gravity Falls, Mike finds himself hooked into watching after an oddball business and the two youths packaged with it. While looking for a way home, he discovers that there are much darker and more sinister things lurking in this strange and quirky town. Perhaps he'll find a pair of unlikely allies in his new coworkers...