A mysterious beast attacks a research station in Antarctica, disappearing into a complete whiteout of a blizzard. When Optimus goes to investigate, he gets stuck in a whiteout blizzard, his systems begin to shut down. His savior is a bit unexpected, but quite nice. A mysterious cocoon is found in a Decepticon mine. When it hatches and attacks the Decepticon leader himself, the beast inside gets lose, alerting another beast like it, and the one who saved who saved the Prime. The Decepticons, feeling that they have no other choice, call a temporary truce with the Autobots to get rid of the beasts, with the help of a new ally, larger than any of them.