"The Ragamuffin Mystery" by Enid Blyton follows the adventures of Roger, Diana, Snubby, Barney, Miranda the monkey, and Loony the spaniel. When the group stays at Penrhyndendraith Inn in Wales with Miss Pepper, they unwittingly stumble upon a mystery. It all starts when Snubby's purchase of second-hand clothes leads to a case of mistaken identity. As they unravel a secret message, the children find themselves on the trail of a dangerous gang. In the sleepy seaside village and nearby Merlin's Cove, they must uncover the gang's sinister plans.