Trixie Belden is in for one boring summer. Her older brothers are away at camp. Meanwhile, she is stuck babysitting her little brother. Then, a new girl, Honey, moves into the big mansion down the road. Trixie couldn't be more excited for a friend--and Honey isn't the only new face in town.

The girls spy someone inside a nearby house--which is especially curious because Trixie knows her grumpy old neighbor Mr. Frayne is currently in the hospital with pneumonia!

Trixie wonders if the stranger in Mr. Frayne's house is looking for the millions of dollars rumored to be hidden somewhere on the property. But the place is too much of a mess for anyone to really believe that...right? Detective Trixie Belden is on the case, and she won't stop until she finally gets the truth.

Peek into the adventurous world of Trixie Belden and unravel a mystery series that has delighted decades of readers.