I got it!
Shumi, Chef and Anshu are secretly planning mutiny.
Meanwhile, Hoban finds treasure maps in an old corner of the ship, but only feels to confide in Orrin and the Captain.
Shumi gets word of this through the Captain and tells Chef and Anshu.
Hoban overhears the plan and threatens (a little too loudly enough to halt conversation) his infamous prophecy.
Shumi, Chef and Anshu then conspire to poison Orrin and lock him in the storeroom so they can handle Hoban one on one later.
Linae got the plate of bad food by mistake.
Linae tells Anshu about her stomach discomfort so he plays Kou-Jong over some herbal tea to take her mind off things.
Anshu steals a Lost Desert piece of the game and plants it on Hoban hoping to blame Hoban if the mutiny plan goes wrong.
Unbeknownst to Hoban the game piece accidentally falls above deck near where he was seen last sulking.
Orrin, having bad eyesight, trips over the game piece, falls unconcsious and Shumi locks him away in the storeroom for "safety."
Linae is confused when she finds the evidence later in her herbally induced haze from Anshu's healing concoction.
When Anshu and Linae are called below deck to fix a leak, they capture and smuggle Hoban below deck, there is a struggle, but Hoban decides to jump ship with his maps.
Orrin hears it all, but being locked away cannot see any details of the crime.
The rest of the crew are acting suspicious because both their Plan A and Plan B went wrong and they have not attained either their aim of mutiny or acquision of treasure maps.
Oh well, I think there is a conspiracy anyway but I don't know what it is.