After Optimus Prime takes a dark turn, Cade Yeager joins forces with a group of Autobots to stop a villainous plot to destroy Earth. A hero turns evil and a collapsing planet heads for Earth. It's up to a mechanic in a Corn Belt junkyard to save humanity.
As a way to make friends, new girl in town Olivia volunteers to work at the Heartlake City World Petacular with four other girls. From training pups to taking responsibility, the new girl in town learns about friends, fun and teamwork.