Speed is competing in the first stage of the Sahara Race. He witnesses a man being buzzed by an airplane, registration R3513K. He uses the cutters to saw the tail off of the plane. The man is Dr. Digger O. Bone, an archaeologist. The gunman inside the aircraft tries to take one last shot at Dr. Bone but he collapses in the sand. Dr. Bone goes on to explain that the previous spring his daughter, Calcia, came over with his assistant, Splint Femur, to examine some of the Egyptian ruins. Dr. Bone gives Speed a photograph of the two. Femur claimed to have found Cleopatra's treasure. Dr. Bone scrawls the letters ""STFT"" in the sand before he dies. After doing some extensive research in the library, probably the one in Alexandria, Speed and Trixie figger out the mysterious code. The ""S"" stands for the ruins of Saqqara, which are on the banks of the Nile. The ""T"" means the ruins of Tamalamal and the other ""T"" stands for Tutankhamen. The ""F"" remains unexplained. Speed decides to drop out of the