Fran is a senior in high school who has always been odd. Her best friend is a full-blooded Potawatomie First Nation woman. Fran's friends call her "Frog" because of her science interest. But her interest soon sends her into the French Guiana jungle to become a shaman's apprentice. The two friends have separate interests, but what binds them together is a man who hates Indians and is trying to kill them.