Shockwave, Decepticon leader, hires the mercenary Death's Head to assassinate Rodimus Prime... much to the dismay of his lieutenants, Cyclonus and Scourge. Meanwhile, on Earth, a young journalist, an archaeologist, and an old friend discover Galvatron and Ultra Magnus, entombed in volcanic lava... and on the planet of Junk, the locals are enslaved by an all-powerful, mind-controlling being! But all these threads will weave together -- in another awesome showdown with Unicron!