Meet eight-year old Nancy Drew, and her friends Bess Marvin and George Fayne, they're the Clue Crew! Together they solve all sorts of mysteries in River Heights. In "Secret Sand Sleuths," a field trip takes Mrs. Ramirez's third grade class to the Modern Art Museum, but something is not right. The girls discover a newly-hired cleaning woman being fired for destroying a sand painting. The girls are convinced she's innocent and immediately set about solving the mystery, with help from the artist, the Venerable Gelek!