A girl with hidden ancestry can tear the world's fabric without knowing. The people who can teach her are split between teaching her — and killing her.
The Seam is the membrane between this world and a multiverse, some of those other worlds peaceful, some monstrous. Sky leviathans migrate through it and quietly mend its tears. An Empire and a sky-mercantile civilization profit from hunting them, dismissing the warnings of the only people who can read what's happening: Sanctuary, the descendants of refugees from a deep-history breach. The protagonist appears to be nobody. She isn't. She carries Sanctuary blood, an unknown power that could thin or tear the Seam, and the misfortune of an ordinary life about to attract two empires and one cosmic threat at once.
We cannot know God, not fully, not finally. Every theology and every science is a partial reach toward something that exceeds reach. Civilizations are built by pretending otherwise. The villain of this world is never a person; it is the imposition of a Local Shared Reality as Universal Truth. No purely evil beings. Only collisions of reality, doing damage by claiming knowledge no one can have.
Two-tier aesthetic by design. The ruling class projects high-fantasy radiance and treats it as Global Truth. The lived reality of most people is dark-cinematic. Visuals shift as the protagonist crosses class lines. Reference points: Children of Dune, The Locked Tomb, Princess Mononoke's spiritual gravity, N. K. Jemisin's geological scale.
A properly built world generates stories from its structure. A few that emerged early:
A veteran sky-merc leviathan hunter, thirty years in the trade, suddenly hears the leviathans sing on a routine kill. He cannot unhear it. His crew thinks he's cracked. The episode is his wandering toward language for what happened.
Seventeen, raised on hunt-trade wealth, taken on her coming-of-age trip to observe a sanctioned kill. Sees the birthing mother die. Cannot tell her father. Cannot tell her class. Begins to quietly research the Sanctuary.
An experimental episode. Almost no dialogue. A male leviathan whose mate is killed during a hunt circles helplessly. The audience follows his grief migration over months and his slow death, carried entirely by music and leviathan-song.
A small sky-merc captain whose family has refused leviathan-hunting contracts for three generations. The other Houses are squeezing them out. Her cousin wants to take a contract to save the business. She has to decide whether to hold the line.
Seam is the flagship project, currently in active development as a YouTube storytelling channel. The full Project Bible, Story Seeds, Episode 1 outline, and Production Dashboard are available to serious collaborators.