ACT I — The DepartureEuropagrade activity becomes a coordinated withdrawal while a distant icy body changes course and humanity realizes a rendezvous is forming.
ACT II — Civilization RevealedThe migration architecture grows and the team begins to understand the complementary civilizational functions behind the three morphotypes.
ACT III — Europa and the Long MemoryThe migration returns toward Europa, opening a deeper view of living memory, environmental infrastructure, and the origins of cometary migration.
ACT IV — Beyond SolThe Second Comet moves outward into interstellar space, carrying the Europagrade civilization toward a larger first-contact horizon.