Early in Assassin's Creed Shadows, players will learn the basic quest mechanics through a mission called "The Onryo Samurai." Functionally, this quest serves as Naoe's prologue, setting up the motivations that will carry her throughout the game. On paper, this is a simple fetch quest in which Naoe must retrieve a literal mystery box that has been stolen by a mysterious organization. However, in practice, this quest can prove to be a bit tricky. In this guide, we'll show you where to find the box at Kaneda Castle, and how to complete "The Onryo Samurai" in Assassin's Creed Shadows.