A carrier pigeon arrived from Athena Pierce. You're not sure how she found you, but you should review her letter.
Athena Pierce reported that someone in your style of armor contacted the Black Wings, an evil organization. Could Nobunaga be making his move? Get to the small room east of the Golem's Temple Entrance right away.
Your ominous hunch was spot-on. Akechi Mitsuhide is in contact with the Black Wings. What is Oda scheming?