An Allegory
The entire planet of H3 has devolved into a toxic wasteland known as the Deadzone. In an antient sanctuary called Carada where the atmosphere is breathable , survival depends on symbiosis with worm, which is slowly transforming the hominids into hideous Deadlife. the inhabitants of Carada are oppressed and ignorant of their government's abuse of power, which has resulted in a hideous caste system and the destruction of society. A handful of resisters emerge, some by design and some by accident, and a reformation begins to free both the planet and it's occupants from the grips of oppression and destruction.