The war against the Decepticons is back on. After the Battle of Chicago, a mysterious group emerges with the aim of steering the fate of humanity, while an ancient menace returns to pose a dangerous threat to the world. Join Optimus Prime and the Autobots as they fight to protect the world from this powerful new enemy with the help of Cade Yeager, a battle-hardened vet, and his homemade team of transformers.