An adolescent girl named Lem searches the deep dark woods for her missing dog, entangling her destiny with a chivalrous mushroom faerie named Gowlitrot on a mystical quest to protect the biome from catastrophic ruin.

As their friendship develops, Gowlitrot pledges to aid Lem in a quest to discover the fate of her missing dog, but as the search progresses, they uncover perilous betrayals that challenge the foundation of each of their worlds— both inner and outer. The natural world may never appear the same again.