Synopsis
After Gravion unleashed its ultimate attack, the Zeravire threat seemed to have halted for a time. But when it suddenly resurfaces, the Earth Gult and its ultimate weapon, the super robot Gravion, are once again called upon to protect this world. Meanwhile, the EFA is developing its own countermeasures against the Zeravire—the Grand Trooper. Now, as they fight to repel the Zeravire, the people of Earth Gult and the EFA must safeguard their future, confront their pasts, and uncover the secrets behind the Zeravire.