Actually, this quest is part of the novigrad storyline and you'll need to finish a couple of other things first (specifically get junior and now or never). These prerequisites make sense story-wise, because you need to establish relationships with certain key players before diving into the political intrigue.

Something worth keeping in mind if you're planning to tackle this quest, make sure you complete it before heading to the isle of mists, as that's a major story turning point that can lock you out of several quests. The quest deals with some pretty interesting political maneuvering between dijkstra and roche, and the choices you make here will echo throughout the later storyline.

Let me break down the recommended order that'll give you the best experience: start with get junior, move on to now or never, and then tackle a deadly plot. This sequence keeps everything flowing naturally and ensures you don't miss any important character development (plus it makes the most sense for understanding everyone's motivations).

Good to know: while you're working through these quests, pay attention to the conversations they contain subtle hints about future events that might influence your decisions later on.