Toga is AWOL. Leele is still recovering from emotional shock. Mizuki and Luna are missing. Ena is dead. Could the situation be any worse? Well, yes, in fact...it can. The Zeravire are intensifying their attack on Earth and the outlook is dire. Hope is revived when the new mech Sol Gravion shows up, piloted by a mysterious stranger. But things get dicey when Hugi appears as a giant hologram and threatens to obliterate all life on Earth in 48 hours! Witness the power of the combined forces of Gravion, Sol Gravion and the EFA Gran Troopers when the final battles begin to take place. All the questions will finally be answered. Don't miss this exciting conclusion to this epic giant robot series!