Sacajawea, a Shoshoni Indian interpreter, peacemaker, and guide, and William Clark alternate in describing their experiences on the Lewis and Clark Expedition to the Northwest.

Nine-year-old Moho Wat, a Sheepeater Shoshoni boy, attempts an amazing rescue.

Sacagawea describes how, at the age of sixteen, she becomes part of the Lewis and Clark Expedition and serves as their interpreter and guide, surviving many dangerous adventures on their trek through the wilderness.