The two sets of Starbuck twins, in New Mexico with their father, meet a six-hundred-year-old Native American ghost and use their telepathic powers to capture the looters of ancient Anasazi artifacts.
In London with their family, telepathic twelve-year-old twins Liberty and July receive strange emanations from an early residence of Arthur Conan Doyle and discover a literary ghost.
The two sets of Starbuck twins use their telepathic powers and the aid of some endangered dolphins to help their father catch a gang dumping toxic waste in the Florida Keys.
