In "Transformers: Origins," the story unfolds on Cybertron, the home planet of the Transformers, focusing on their youth. It narrates the tale of Optimus Prime (voiced by Chris Hemsworth) and Megatron (voiced by Brian Tyree Henry), leaders of the Autobots and Decepticons respectively, as they transition from allies to adversaries, igniting the long-standing war on Cybertron.