The Wicked Eyes and Wicked Hearts mission — the Inquisition’s formal entry into Orlesian high society at Halamshiral — is Dragon Age Inquisition’s most mechanically distinct quest: a social stealth mission where combat is a failure state, dialogue choices determine the evening’s political outcome, and a favour currency called ‘Court Approval’ rises and falls with every interaction.
The mission’s hidden layer: a complete assassination plot running parallel to the main objective, involving the Court Jester Florivet, who is not who he appears. Finding all evidence of the plot requires exploring every room of the Winter Palace — including servant areas, private gardens, and rooms locked behind favour thresholds — and reading every letter and listening to every private conversation before the evening ends.
Completing the Florivet plot yields a political reward that affects the Inquisition’s standing with Orlais throughout the rest of the game. Missing it is not flagged. Players who completed the mission without finding Florivet’s plot had a coherent experience. Players who found it had a meaningfully different Orlais subplot for the next forty hours.
BioWare designed Halamshiral knowing that most players would complete it once and never return. The architecture of the Winter Palace, the movement of the Court across the evening, and the multiple timed events — all built for a single playthrough. The density of the content relative to its single-use nature is among the most ambitious designs in Dragon Age Inquisition.

Currently on my first run and now I have to go back and look for this. Worth the detour.
Found this by accident on my third run. Came here to understand what I was actually looking at. Great write-up.