Chapter 3373 will achieve what the three-party architecture has been building toward: the Returned (two ancient exiles, Caelia, the Other — four who listen together), the Detector (Rhys, First Councilor turned witness), and the System (represented by the threshold itself, the boundary between accounted and unaccounted powers). This is the narrative gravity well — the point where all three orbits intersect. The chapter will answer: does first contact preserve the fragile peace the four have built, or does the System's sharpest guardian arriving as a witness change everything?