Set immediately after the events of Transformers: The Last Knight (2017), Rise of Unicron explores the consequences of the awakening of Unicron, a colossal cosmic entity that threatens to consume Earth. Optimus Prime, along with the surviving Autobots, must gather forces—including old allies and even enemies—to confront the most powerful threat in the universe. The balance between organic and cybernetic life hangs in the balance as new forces emerge, including humans, Quintessons, and other unknown races.