Spud - he's scatty and accident-prone - but good with the gadgets. Star - she's super smart and ready to pounce ...Together they're Spy Pups, following hot in the paw prints of mum LARA (that's Licensed Assault and Rescue Animal to you). Beaches up and down Britain are in terrible danger. A greedy trickster is polluting the seas - soon there'll be nowhere safe to swim. But when Spud discovers a mysterious underground secret, only he and Star can save the day - and the seaside!