Lu and Clancy, those clever sleuthing canines, are back to solve the mystery of Lu's Aunt lzzy. Is she a spy? If not, then why does she have disguises and fake IDs hidden in an old trunk? Suspicious, they decide to investigate by using the techniques that real spies use. Sixteen hands-on spy activities, including making a spy code ring or spy scope to see around corners, help kids uncover the true identity of the mysterious Aunt lzzy.