Signatures in the hotel guest register lead Conan to the murderer.; Richard is hired by the granddaughter of a concert virtuoso to solve the gruesome murders that keep occurring around a priceless Stradivarius violin.; The broken lock strike from a door leads Conan to the killer.; Conan and the others reach the pedestal holding the Nio Stone, only to find a note from Kaito Kid saying he'd already taken it.; Rachel finds a text message she sent Jimmy on Conan's cell phone, once again arousing her suspicions that Conan may somehow be Jimmy. And Richard is hired to find a missing cell phone.; Using clues etched into the stone lanterns, Conan and the Detective League explore the villa for a reputed treasure hidden there. On the way, they run into three other people searching for the same thing.; Conan has suspicions that the fire in the mansion annex was set and that the next intended victim is the granddaughter.; Conan's initial theory is shattered when Grandmother Ayane leaps to her death after smashing the Stradivarius.; The discovery that the broken violin was a fake leads Conan to suspect the woman was driven to suicide.; While camping, the Junior Detective League finds an old villa with its decorative stone lanterns smashed and thrown into the decorative pond as weights to hold down a body.; The clues lead everyone to an underground chamber beneath the villa and the legendary Sword of Kusanagi.