As BlackZarak's Devil Power throws America into chaos, Overlord seeks to prove the power of the flesh to Devil Z, and he engages Ginrai in their final, decisive confrontation.
When Shūta and Clouder are captured while attempting to infiltrate the Decepticon base and used as bait to lure Ginrai into a trap, things look grim for the Autobots... until help comes from a most unexpected source!
With construction of a new Decepticon weapon occurring in the shadow of the Moon, time is against the Autobots as they race into space in an attempt to stop the destruction of all life on Earth!
At last, BlackZarak arrives on Earth, and chaos follows in his wake, as Decepticon attacks spread thin the Autobot forces on Earth, and Ginrai and Grand Maximus fall victim to a deadly trap in space.
The final Godmaster Transtector turns up in possession of a young man named Clouder. But this particular Godmaster has a special ability which could spell the downfall of the Autobots...
In the heartland of America, the Decepticons spring a trap that puts Godbomber in danger, forcing the Headmaster Juniors to discover a new power that will save the day.
Both Sixknight and Cancer have been greatly affected by their experiences with the Autobots and decide to do something about their conflicted loyalties.
The search for the fourth Godmaster brings the Autobots and Decepticons to France, where the Headmaster Juniors attend the finale of the World Grand Prix, and meet the champion racer, Road King.
A new threat to the Autobots arrives from space in the form of Sixknight, a Six Changer who targets Ginrai in order to prove his worth to the Decepticons. But Sixknight is in for a shock when he discovers the true nature of his opponent...
Attempting to track down new leads on the location of the remaining Godmasters, the Autobots venture into the Rocky Mountains, where they cross paths with a forest patrolman named Ranger, but Minerva suspects that he is working with the Decepticons!
The command goes out for the Decepticons to utterly destroy Ginrai, and he inadvertently makes himself easy to find when he appears on television searching for the remaining Godmasters!
While Ginrai debates over whether or not to join the Autobots, the Decepticons begin a series of fatal attacks on his trucker friends in an effort to draw him out.
On the day that he discovers a mysterious truck, a young man named Ginrai suddenly finds himself caught up in the war between the Autobots and Decepticons.
The construction of the world's largest tidal power plant in the Karin Islands quickly attracts the attention of the Decepticons, and the Autobots are once again faced with the power of the Godmaster brothers.
Wilder continues to revisit his past when he kidnaps a former member of his gang who turned against him, and Shūta has to lead the Headmaster Juniors in rescuing him.
Minerva is forced to overcome her fear of fighting when the Decepticon Headmaster Juniors cause chaos as they seek revenge on a motorcycle gang from Wilder's past.
Seeking live humans for their Destroid experiments, the Decepticons attack jumbo jets, bringing the Autobots into contact with a young girl named Minerva.
The Decepticons transform human corpses into undead "Destroids", and then attack the island nation of Karin, where the Autobots must team up with the island's prince, Cab, to save the day.