Madame Shu is the artificer and key engineer aboard the Noelani, an experimental hovercraft that could potentially revolutionise transport across the pacific ocean. Whilst en route, she is brutally murdered in the ship's engine room.
Passepartout discovers the body after Shu's absence causes the ship to veer off course; worse still he also discovers that she was killed with one of his possessions (either the .45 Calibre Rifle, the Hammer, the Katana, or the Wrench depending on what the player bought in Yokohama). Thus the Captain accuses Passepartout and Fogg of the crime, giving them until their arrival in Honolulu to prove their innocence by uncovering the real culprit.
There are four suspects;
- Captain Keake: The Noelani's captain and a close friend of Madame Shu.
- Mr. Jaffer: A disgraced former police detective.
- Ms. Carlotta: The wealthy owner of a shipping company.
- General Peters: An elderly and somewhat racist ex-officer in the British army.
Warning: Spoilers Follow
Towards the end of the journey, Passepartout will gather all of the suspects in a room to make his final accusation. In order to navigate this dialogue path to the correct conclusion, it is essential to uncover several important pieces of information;
- Mr. Jaffer's estimate of the time of death is a guess, based solely on the temperature of the body when it was discovered (it was cold, leading Jaffer to deduce she was murdered several hours prior to the ship going off course).
- The ship's engine frequently makes a high-pitched squealing noise.
- Cold air is often blasted into the engine room from a nearby valve.
- Ms. Carlotta runs a competing shipping company and was trying to convince Madame Shu to leave Captain Keake and the Noelani and join her instead.
Passepartout can discover these pieces of information through his investigation options; #1 by talking to Mr. Jaffer, #2 by talking to General Peters, #3 by examining the engine room (imagining how the crime took place), and #4 by talking to Ms. Carlotta (but only after talking to General Peters, who saw Ms. Carlotta and Madame Shu speaking earlier). With this, Passepartout uncovers the true circumstances behind the crime;
Mr. Jaffer's estimate of the time of death is actually wrong - the reason Madame Shu's body was so chill is because it was blasted with cold air by a valve in the engine room. Therefore, Madame Shu did not die hours before she was discovered (a time when most of the suspects had alibis) but only minutes, at a time when Ms. Carlotta was seen running from the engine room. It was Ms. Carlotta who murdered Madame Shu after Shu rejected the offer to come and work for her. Fearing the Noelani's superior speed could cripple her company, Ms. Carlotta used her understanding of the ship's engine to plan the murder, using the routine high-pitched squeal of engine to mask Madame Shu's fatal scream and letting the cool air chill the body and confuse the time of death.