The adventures of a young white boy living among the Shoshoni Indians during the early frontier days.

Spider is afraid to get up on stage in front of everybody in the school spelling bee, but after listening to his father's advice, decides that he too will try to be as brave as his Shoshoni ancestors.

Visiting Zion National Park with his family, twelve-year-old Jack encounters two mysteries, the strange behavior of a band of wild mustangs and the possibly sinister actions of his new foster brother, a Shoshone boy.