Strange things are happening in Southwold - Lucy is no longer the fastest girl in school, Max has been reading Sherlock Holmes and Joe's mum is having the awful Fitchwitheringtons over for dinner. Strangest of all, dogs have been going missing all over town and nobody knows who is taking them. Things go from bad to worse when their old friend, Captain Tom, loses his beloved pet Pugly to the dognappers. If only there was something The After-School Detective Club could do about it. Then again, maybe there is ...