When Moriarty’s 16th birthday party is interrupted by the arrival of one Tanaka Pu, on the run from the police, Mrs. Hudson (a weird but clever adaptation of the original landlady character) hears him out.
When Lestrade arrives to arrest him for murdering his Uncle Cosmos, Hudson intervenes by bribing Lestrade and giving the assembled detectives a job: prove Pu’s innocence.
Sherlock and Watson visit Pu’s house and interview his mother, but Holmes is really there to get the measure of who Pu and his family are by studying their living space. Kyougoku Fuyuto is also on the case, mostly because he’s a huge fan of Pu’s uncle’s “legendary rocker” friend B-zou, who says every eighth word or so in English.
It’s nice to see another side of the usually very uptight Fuyuto, but when he insists Pu is indeed the murderer based on the preponderance of evidence, Sherlock voices his disagreement, and delivers an alternative possibility based on the information he’s gathered.
In his now-trademark rakugo style, Sherlock deduces that Uncle Cosmos isn’t dead at all, but faked his death as a murder committed by his nephew. The charred remains weren’t him, but his brother, Pu’s father. In fact, this whole time Cosmos has been hiding inside a mirror mounted above the bed in his penthouse.
It’s another fun and zany enough case, though somewhat predictable; I was pretty certain the murderer was either B-zou or a faked death situation, and I’m usually terrible at such predictions. Watson’s cold-open narration of the events that led to him seeking out Sherlock felt tacked-on and somewhat clumsy.
Now that they’re officially roommates, perhaps he’ll soon get a chance to bring up his case. As for Moriarty’s pressed clovers and the giant moth he kills…I got nothing, though someone on a forum suggested they represent Jack the Ripper’s victims. All I know is, classic Moriarty (AKA Ratigan) is Holmes’ arch-nemesis.