Although Rebecca and Happy go into Belial Gore to deliver medicine to the injured Weisz, they are found by the Sylph of the Wind and captured. Shiki, Homura, and Pino receive Rebecca's communications and go to the loading docks, only to find that Rebecca is not there and in her place is the Element 4 Sylph and another "surprising" individual.

As her Ether Gear powers are activated, Rebecca goes back in time to before the Belial Gore infiltration and offers information to Shiki. Master Noah appears in front of Shiki and the gang, as they arrive at Drakken's hideout and says that he has a message for Rebecca.

Shiki and the gang grasp a secret clue about Drakken Joe. As they discuss strategies for their next course of action, they notice that something is wrong with Labilia… Suddenly, Drakken Joe appears, sensing an Ether reaction. A head-to-head battle between Shiki and Drakken finally begins!

Edens Zero is cornered by Edens One and Shiki and the crew are saved at the nick of time by the space pirate Elsie Crimson. After the battle, Elsie boards Edens Zero and talks to Shiki about something Ziggy had asked her to do a long time ago.

Shiki and the gang get through Dragonfall and arrive at the Aoi Cosmos, which is ruled by Poseidon Nero of the Oración Seis Galáctica, and land on a fire planet, Red Cave, at the suggestion of Witch. The planet is overflowing with Water Ether, and is an environment that is a far cry from a "fire planet" covered by the ocean. As the Edens Zero crew enjoy a brief vacation at the ocean, they discover a town beneath the waters...!

The robots attack the ship and Jin, Kleene and Laguna have to defend their new allies. Meanwhile, on the planet, Shiki and the others are confronted by Poseidon Nero, who has been ordered to eliminate all robots.

Shiki confronts Orc from Poseidon Nero's Commando Team "Beast". Orc tells Shiki that they were ordered by Nero and are on a mission to cleanse this planet, which was under the control of Ziggy.

Now that everyone's back on the ship, Shiki introduces Xenolith, who has some disturbing statements that affect Shiki and his companions. Meanwhile, Oceans 6, Poseidon Nero's group, assembles and prepares for their next move.