Cosmo cries after hearing of his father’s death. Deck wonders if there are any survivors in New Lopia. Cosmo says all the survivors would be at the second excavation site, so they head there on the Sol-Conver. Meanwhile, Mayaya sneaks through the woods and arrives at the excavation site. A soldier, not aware that she is an alien, lets her in. She wanders down into the ground where the refugees have all come into the giant ship in the ground. Karala, also in the ship, is confused about why the aliens buried this ship in the ground. Sheryl notices Karala and thinking she is a recent colonist, tells her not to wander in a classified area like this. Mayaya catches up with Karala. Mayaya wants to return, but having overhead Sheryl mention Ideon, Karala wants to stay. In one of the rooms of the ship Lotta and Lin take care of Lou, Ashura and Fard, another one of the children. Deck goes to see Bes on the bridge, but Bes doesn’t want any help from him. Sheryl thinks they should be doing more investigating, but Bes wants to be prepared in case there’s another attack. A technician confirms the enemy is near and Bes tells Sheryl he thinks there is a spy on the ship. Meanwhile Gije and Damido track Mayaya’s location aboard the Gram Zan, which has landed on Solo. Damido wants to ask help from their boss, Abadede, but Gije instead requests volunteers for a suicide mission to rescue Karala. Two soldiers, Zudakka and Damae, volunteer for the mission. Karala and Mayaya continue to wander through the ship and are caught by Bes. Bes recognizes Karala from earlier but Mayaya shoots the guard with Bes, revealing they are aliens. Karala admits that they are from the Buff Clan. Gije’s forces head through the woods. Nearby Cosmo and some engineers work on the Sol-Conver. Suddenly a group of Dekka Baus start attacking. Cosmo heads into the air and transforms into the Ideo-Delta. The Sol-Amber and Sol-Vainer also head into the air to confront the enemy and soon dock into the Ideon. Back on the Solo Ship, Mayaya hands over her transmitter to Bes, who turns it off. Bes is surprised they are aliens since they look exactly like humans. A group of Gadakkas run through the woods and attack some of Solo’s tanks.
Gije and Zudakka arrive on the Solo Ship with a number of soldiers. Zudakka finds Lotta, Lin and the kids and fires at them, but a barrier forms around them and reflects the blast, killing him. Gije is shocked and runs away. The Ideon continues to be attacked by the Dekka Baus. Damae is killed by a Cabian Collosus plane. The Buff Clan soldiers retreat. On the Solo Ship, Sheryl wonders if they had some diversionary tactic in mind when launching the attack. The Ideon returns to the Solo Ship, not separating when it arrives as it had before. Meanwhile in space, the Gataman Zan approaches Solo. Abadede tells his men to contact Gije. Deck tells Cosmo about the buried ship. Sheryl explains to Bes what they know about the ship. They have researched texts from the ‘6th Civilization,’ the alien race that had lived on Solo in the past and created the ship, but the only word they got out of it was ‘Ideon.’ Bes wants to take off, but they’ll have to melt the rock surrounding the ship first. The Gataman Zan and Gram Zan meet up in space. Gije tells Abadede his plan to launch one final suicide attack on Solo, but Abadede talks him out of sacrificing himself. Technicians pull a Black Hole Transmitter out of the remains of the Southern Cross. Various supplies, weapons and animals are brought onto the Solo Ship. Gije leads another squad of Dekka Baus towards the Solo Ship. The alarm goes off at the excavation site and all the civilians rush into the ship. The Ideon heads out to fight off the Dekka Baus. The Buff Clan’s Maza Dowaroma craft lands and sends out a number of small Draangle crafts. Gije fires at the crotch of the Ideon, damaging it. The Dekka Baus fire missiles directly at the Solo Ship. The ship starts shaking, but due to an earthquake, not the attack. The rocks surrounding the Solo Ship crumble away and the ship ascends into the air. Joliver tells Bes that they aren’t done with the engine, meaning the ship moved on its own. Gije wonders how the ship came out of the ground.
The discoveries continue in this episode as we are shown the mysterious Solo Ship, buried at one of the excavation sites. Like the Ideon before it, the ship moves on its own, as if it has some mysterious power behind it. Another mystery is the barrier that suddenly went up around the kids when the Buff Clan attacked. It’s as if the ship wanted to protect them or something. We are introduced to Gije and Damido’s boss, Abadede, who continues the Buff Clan tradition with his bizarre green hair. The odd name is a Tomino tradition that we’ll see all the time in his shows. Gije seems a little too hasty here, willing to sacrifice his life even though it’s been so soon since the battle began.