Eagle Tower is just about the most important place in the world to Cam Walker and his friends. The first Outrider expedition ever was a hike to Eagle Tower. In fact, it's where they became Outriders. So when they find out that a mining company is going to tear the tower down in five days time, the Outriders decide to plan one last expedition there. But, as usual, things don't go exactly as planned. For one thing, the friends run into another group of kids who feel the same way about Eagle Tower as they do, then the mining company starts dynamiting five days ahead of schedule, and on top of all this, one of the Outriders is keeping an important secret...
