Baharonaut; The largest planet-sized warship in recorded history, with the most advanced AI system, and, when it was stolen, the biggest and widest known scandal in all known universes to date. The Vallon are mythical aliens who dominated the universe, which is so large the humans consider them practically myth. So is the reality of the size of our universe. They hunt down gold, the only thing in the universe that can hurt them, loading it onto planet-sized warships and hauling it to be destroyed. The Baharonaut was the most recent ship of the Vallon, full of the gold of the universe, the only one within thinking distance of humans. And one day, it... disappeared.
Without a trace.
the real cause of the disappearance was Oneironaut, a man who used multi-plane jumping to stowaway on ships and steal things, then jump to a new place in space-time. Something finally happened... he took the jump and ended up on the Baharonaut without even knowing what the ship was. Its size is massive. The Vallon seem to exist, but on another plane. To Oneironaut, the ship is empty. He's trapped in an alternate plane. Now he can only jump around on the Baharonaut and the ships he trapped nearby (or the ships that where wrecked in the Baharonaut's wake decades, centuries ago). Hydroponics Deck, a woman stuck in a time loop on the Ishimura. Kinesis, two humans who where in an escape pod years ago who got trapped in the Baharonaut's wake. Four Calling Birds, an assassin who previously had 4 different existences in 4 different parallel universes, now all trapped painfull in this one, eager to hunt down Oneironaut, rip the planar shift tech from his body, and ease their own suffering. Viscera, a woman whose job it is to clean up ships after scifi disasters happen and who sees the Oneironaut, Baharonaut's AI, Kinesis, and Hydro as ghosts on a totally different ship. And Mee, a young woman who is hunting down the treasure on the Baharonaut despite coming from a little planet where nobody believes the vallon or the treasure exist.