Transformers One is a 3D animated science fiction action film set in the Transformers universe. It explores the origin story of Orion Pax and D-16, who later become the iconic rivals Optimus Prime and Megatron. The film focuses on their friendship, the events that shape their destinies, and the conflict that leads to the rise of the Autobots and Decepticons. It was produced as a standalone theatrical feature rather than a series installment.