The Mystery of the Lost Mine: On a camping trip to Arizona with their grandfather, the Alden children search for a lost gold mine. The Guide Dog Mystery: When they help out at a guide dog training school, the Alden children meet several people who seem obsessed with a particular dog named Ginger. The Hurricane Mystery: While visiting a friend of their grandfather's on Sullivan's Island, the Boxcar Children encounter mysterious activities related to rumors of a buried pirate treasure.