Transformers and humans have been battling for years. Optimus Prime leaves Earth to find his maker while Cade Yeager tries to salvage and hide as many Autobots as he can. Unknowingly, history has a way of coming alive. The Transformers have been on Earth since King Arthur’s time and have played important roles in history. But buried with Merlin is a weapon which only one of his decedents can wield and everyone is after it.