One day, Will's father gives him no choice at all--he will come along with him on a wilderness adventure, following the trail of legendary American explorers Lewis and Clark, from Fort Mandan all the way to the shining Pacific Ocean. Along the way, Will meets fascinating locals, experiences both wanted and unwanted thrills--like whitewater rafting and a bear encounter--and learns about America's past, about his family, and about himself when he faces his own, life-changing test of courage.