Is there a creepy creature lurking in Mossy Lake? Is an evil plot stirring? Is something shocking happening to Caitlin's cat Zappy - and can he be de-zapped? Would-be scientists and detectives will want to slip into their lab coats, dust off their test tubes, and get on the case with Drake Doyle and Nell Fossey. Hint: to find the answers, kids will have to use such scientific principles as buoyancy and static electricity.