The world-building is deliberately obscure, you're meant to piece together what the Idaten actually are while watching them get systematically dismantled by enemies they didn't know existed. Peace was a lie the gods told themselves, and the show tears it apart with animators who seem personally invested in making that destruction visceral. By episode three, you understand: there are no good solutions here, only choices that cost something irreplaceable, and the art style keeps you off-balance so you can't retreat into comfortable certainty about who deserves to win.

Eight centuries of peace have passed for the Idaten. These swift warrior gods were legendary once, celebrated for sealing away demons in a catastrophic war that's now faded into myth. The current generation knows nothing but tranquility, their divine speed and strength rendered irrelevant by centuries of safety. They learn from Rin, the last Idaten left from that ancient era, while finding a place in a world that no longer seems to need them. Then the demons return, revived by the tyrannical Zoble Empire, and the untested gods are pulled onto the battlefield. Gods, humans and demons collide in a three-way struggle with no rules, where armed forces, cunning, politics and intrigue all count as weapons. The Idaten's peaceful existence shatters against a world far more complicated than any myth prepared them for.