" A Crime Within the Walls " is the of the anime series Sword Art Online (SAO). It kicks off a two-part murder mystery arc where Kirito and Asuna investigate a seemingly impossible death occurring inside a "Safe Zone". Plot Summary

You can find the episode on platforms like Prime Video and Google Play . Sword Art Online: Common Storage | Operation Rainfall

They team up to interview witnesses and eventually link the incident to a former guild called Golden Apple , whose leader, Griselda, was murdered under suspicious circumstances months prior. Key Characters

The lead investigators who begin to develop their working relationship during this arc.

While Kirito and Asuna are taking a break in a town on the 57th Floor, they witness a player named Kains hanging from a window, pierced by a black spear, before his avatar shatters.

Griselda’s husband, whose motives regarding a rare ring item drop become central to the mystery's resolution in the following episode. Guide to Watching

Deaths in towns (Safe Zones) are theoretically impossible due to the "Anti-Criminal Code" unless a player accepts a duel. Since Kains did not appear to be in a duel, the duo investigates how he was killed.