A young girl grows up an outsider, then becomes drawn into the life of a local family with some curious beliefs. They treat her as a daughter, and take her away with them to a religious holiday camp. It is here that she is introduced to the Finnish Envallist branch of Protestantism, and here that events start to take a terrible turn. Rejected by some of the sectarians for her non-commitment to their beliefs, Natalie creates a rift in the group which culminates in a climactic event. Later, as an adult in Finland, she tries to make sense of what happened and to unlock the secret origins of Envallism itself.