It's the start of the summer hols and Megan and Lauren go to the Magic Mountain Rescue Centre to bring home two of the cutest, most adorable puppies in the world. With their friend, Caitlin, and her toy dog, Daisy, they start a Puppy Club. But when they hang the Puppy Club medallions on their pups, something mysterious happens - a sudden, dizzying whirl of light whizzes them to Sleuth City and Daisy comes to life! Spotting a headline about a missing pooch, the three doggy detectives are soon on the trail of a dognapper - and it's all the girls can do to keep up!