Fletcher, a basset hound, and his flea sidekick, Jasper, decide to investigate when it appears that a cool ghoul is haunting Raccoon Lodge and causing trouble for their timid raccoon friend, Rocky.
In 1860, eleven-year-old Annie, who lives at the Red Buttes Pony Express station in the Nebraska Territory, asks Pony Express rider Billy Cody to help her find the person responsible for sabotaging her favorite pony Magpie.
On her journey to the distant planet where her parents are working, twelve-year-old Puck befriends a troubled alien and becomes involved in a dangerous mystery involving a precious artifact.
Nancy investigates two mysteries. In New York she seeks a missing Chinese girl who is in danger. She also goes to Hong Kong to find several missing beneficiaries to a will.