A summer vacation turns into an exciting adventure for the Magnificent Six: Brandon and Braxton Webb, Heather and Ashley Monroe, and Bobby and Linds Doolin. The six cousins went with their parents and grandparents to Yellowstone National Park. While visiting the park, they encounter unexpected developments. Theft, robbery, and an unsolved mystery are all part of their vacation experience, plus meeting and assisting the local law enforcement and the FBI. This book is an adventure to the very end.