A holiday whodunit for kids, this story solves the mystery of who stole Tallie's sparkly, twinkling, candy cane Christmas lights. Tallie first suspects the thief is the mailman, and then infers it could be her slobbery pup, Fuego. She soon learns, however, that neither is the culprit To find out who swiped her lights, Tallie dons her spy gear-her ski hat, pink sunglasses, magnifying glass, and spy blanket-and sets off to solve the mystery.
After sneaking by Mom-thanks to the powers of her spy blanket-and examining the thief's footprints in the snow, Tallie sets a trap. When the thief comes for Tallie's new playhouse decorations, he's in for a surprise-waiting by the window is one super sneaky spy. Tallie and Fuego dash after the thief as he drags the decorations through the snow. Upon reaching his nearby home, they discover the thief's great decorating taste, which Tallie cannot bear to ruin. Instead, she gets a super spy idea and strikes a deal to get her glowing candy canes back. After all, the holidays are the season for giving, aren't they?