The Autobots hunt what scraps of Decepticons remain around the Earth, and make a deadly discovery that revives an ancient Decepticon menace known as Shockwave.The Autobots hunt what scraps of Decepticons remain around the Earth, and make a deadly discovery that revives an ancient Decepticon menace known as Shockwave.The Autobots hunt what scraps of Decepticons remain around the Earth, and make a deadly discovery that revives an ancient Decepticon menace known as Shockwave.