Every 400 years, a werewolf is born into the Fangsworth famly. The baby, when it sees the moon, immediatly turns into a werewolf. Soon, "Fangs," grown up, is teamed up with Pugs, and two others, and his nephew, Baby Fangs. They go around fighting crimes, just like Scooby-Doo. The show usually ends with them seeing the sun and turning human again.