During Christmas vacation at an Arizona dude ranch, Trixie Belden and the other members of the Bob-White Club help the ranch's owner learn why his workers have left so mysteriously.
After a storm blows through Sleepyside and damages the Bob-Whites' clubhouse, Trixie and Honey take a job patrolling the game preserve and find evidence of a poacher.
Not long after her family becomes wealthy, Diana Lynch's long-lost uncle appears and starts ruining her social life, causing Trixie Belden to investigate whether Uncle Monty is an imposter out to steal the Lynch fortune.
The Bob-Whites, plus their friends from Iowa, add detective work to their New York City sightseeing trip after Trixie helps a stranger and receives, as thanks, a purse containing a cryptic prophecy and a promise of great fortune.
