Francis Tucket, Lottie, and Billy have survived many hair-raising adventures, joined together by their goal to find the family Francis lost when he was kidnapped from a wagon train on the Oregon Trail. And now they are also joined by a secret -- the gold they discovered in a Spanish grave. This time, the trio meets up with a British adventurer and bloodthirsty ex-soldiers, and has a tragic, heroic encounter with Jason Grimes, the mountain man. In this, their last adventure, they find their way home at last, and an epilogue tells what happened to them on the Oregon frontier.