Attending Mr. and Mrs. Pig's wedding party on the steamboat Sally, detectives Sam and Dudley follow some confusing powdery trails in their search for Mrs. Pig's stolen pearl necklace.

While on a school trip to the British Arts & Antiquities Museum, John Watson and his friends from the Baker Street Academy get involved in a mystery when the Alpine Star, a famous diamond, is stolen.

When a baby kangaroo gets accidentally swept up in a jewelry heist, she becomes separated from her mother for the first time in her young life. Alone and frightened, a worldly teenage girl Ella, who also knows the pain of losing her mother, discovers her and nurses the joey back to health. However, when Joey is falsely implicated in the robbery, Ella has to work quickly to reunite her with her mother before she's either captured by the bumbling jewel...