A big auto race is happening nearby, and G.H.O.S.T. has a top-secret mission for Optimus Prime and Megatron: make sure there are no rogue Transformers robots competing in their alt modes. At first, Optimus Prime and Megatron figure this will be an easy mission... until they arrive and discover Bumblebee, the Terrans, Robby, and Mo all at the racetrack. If G.H.O.S.T. finds out about Bumblebee and the Terrans, everyone's cover will be blown! Can Optimus Prime and Megatron work together to save the day and keep everyone's secret safe?