The Selva shapes human life. It surrounds settlements, separates territories and makes every journey dangerous. Each person is connected to it through a symbiont: a living organism that grows alongside its host and transforms their body. Abilities develop through experience and need. Fire is sacred, and only a few are permitted to wield it.
Missionaries venture deep into the Selva, carrying knowledge, symbionts and rituals in an effort to spread their faith. They see their journey as a duty. For those they encounter, their arrival disrupts an established way of life.
The further they travel, the harder it becomes to remain certain of their cause. The living environment changes their bodies, encounters test their beliefs, and continuing the mission demands ever greater sacrifices. How far will they go for an idea—and what will remain of who they were?