When Nancy and her friends ride deep into the Shawniegunk Forest in search of a flying saucer, they find themselves in the middle of more than one mystery.
Wildcats, runaway horses, deadly snakes, a disappearing Indian, and a loveable old naturalist in search of treasure hidden by his father years before, keep the sleuths tangled in danger and suspense.
Finally, during a frightening windstorm, the spacecraft arrives.
Nancy and Ned experience an unforgettable journey before they return to solve not one but two spectacular mysteries.