By day a quiet, unassuming guard at the Dogopolis Museum of Art, Arthur Dog's eyes grow bright and his fur glistens as he takes a box out of the closet when the moon is full. Done with guarding those priceless treasures done by Pablo Poodle and other great masters, Arthur unlocks his box and creates a few masterpieces of his own. Some are his own paintings and others are his masterful detective work when thieves nab valuable paintings. Who was that Art Dog? Who was the superhero who saved the day?