First page's side-note: "Jirokichi has appeared! So that obviously means that...!?"
A widow brings Jirokichi a trick box named "Tree God" said to be a work by Samizu Kichiemon, her late husband stuffed the instructions to open it on a book he donated to Jirokichi: the box contains the world's largest moonstone (Moon Memories [Luna Memoria]).
File 963: Tree God
Conan sees Jirokichi's "challenge" on the net: Haibara tells him to get ready because she's sure he's also been called as well: turns out she and Agasa have been called in as well.
Okiya shows up with the stew, as usual, and joins their talk but since it's not a murder case then he quickly leaves the scene yet, when he exits the Agasa house, someone takes a photo of him.
Shortly afterward, Agasa, who's coming out late since he didn't find his driving license, gets a photo taken as well.
Sonoko is waiting with Ran and Kogoro at Jirokichi's library: Conan and the others are already there.
Kogoro has a summer cold which is aggravated and doesn't look like he'll be of much help but Sonoko, who wants to meet Kid, decided to give him plenty of candidates to disguise as and lured him in telling him she had tickets for a Yoko Okino concert.
The police are on standy on the outside this time.
Kogoro tries to open the trick box but gets a needle stabbed on a finger and Agasa becomes the prey (of his anger?). Kogoro says they cut off the box with a saw but the widow refuses: the box is also valuable and the inside glows in a blue color like the moonlight.
Okiya: "Adularescence... The blue moon stones that display this special effect are quite valuable... What's more: if it's this big... It might indeed fit with the trick box by Samizu Kichiemon..."
Okiya has come despite he'd said he wasn't interested: he told the police he was a friend of Agasa and they didn't check him. Jirokichi says that this time he doesn't mind if plain customers who aren't Kid fans come: he's placed the box so that everyone can touch it.
There's a weight sensor below the ground of table where the trick box is placed at so if someone tried to grab and run away a cage would drop and the steel shutters of the whole mansion would close as well.
The widow says that if someone managed to unlock the box the music box her late husband placed inside would ring as well.
Instead of trying to open it at random, it'd be faster to find the book her late husband donated with the instructions or so she suggests.
Jirokichi leads the group to the room with the book... and turns out the library in this room has over 10,000 books on it!
Jirokichi: "You can search for it here, can you?"
Conan (There's too many of them...)
Side-note: "The hints are within a lot of books... Who'll be the one that'll be able to open the "Tree God"?"