Lucky Luke and Jolly Jumper meet an old friend, the prospector Dirk Digger in Extasty over a recent gold ore discovery, en route to register his gold mine claim in Nugget City. Celebrating loudly at a saloon, Digger is identified as a target of robbery by two hardened criminals, and after assaulting him alone in his room, they get away with his gold and a map leading to the gold mine. The following day, Lucky Luke and Jolly Jumper take up pursuit following their trail. Suitable for self-study, building vocabulary, and developing reading skills.