During a battle with Alessio, a giant creature known as a Celestial Beast appears before Ueki and claims that Ueki is not human but, instead, a Celestial! Thanks to the guidance from the beast named Tenko, Ueki becomes aware of his true abilities as a Celestial. They go back to the Robert's 10's hideout, where Tenko is surprised to find out that Robert is also a Celestial. Not only that, compared to Ueki, who is a two star Celestial, it turns out that Robert is in a league of his own - he's a ten star Celestial! To become stronger, Ueki begins his training inside Tenko's Awakening Chamber. However, once inside, Ueki is put in a dangerous situation with a time limit ticking away?