Tochiro is ill, but Dr. Ban doesn't have the right chemical to test how ill the little man is. Kei risks travelling to an Illumidus-controlled station to get it.
Rebi's cat breaks Tochiro's radio, sending him storming off the ship. Rebi, Tadashi and Dr. Ban go after him, and soon all four of them are stranded on a dangerous planet.
The Arcadia, again badly damaged, is forced to hide in the waters of an ocean planet where the pressure is so great it will implode the ship if they don't repair it in time.
The crew of the Arcadia try to take much needed shore leave on a neutral planet. They are forced to leave because of the Illumidus' treacherous and destructive ways.
After a trip to a planet covered in water, an explosion causes the full water tanks of the Arcadia to empty, forcing them to make an emergency landing on a planet made of metal.
The Arcadia needs repairs, but a complicated part is needed. Tochiro knows of one man who make it, but that man lives on a planet ruled by the Illumidus.