This is the continuing story of three fifth graders who read in the local newspaper about a hundred-year-old bank robbery that went wrong. The robbers are dead at the scene, and no one can find what happened to the money. Many over the years have tried to find it and failed. Becky, Katy, and Tommy know they can find it with the help of a mysterious cylinder. The cylinder is a time machine. This book tells of their travel back in time to the Old West and the adventure of a lifetime.