A full year after Optimus Prime's resurrection, Galvatron and the Decepticons attack both the planet Cybertron and Earth with the aid of four new members: the six-changing ninja officer Sixshot and the three Headmasters, Destrons whose heads can change into smaller robots in vehicle mode. These include the vampire-like Mindwipe, the gator-like Skullcruncher, and the wolf-like Weirdwolf...