史酷比和他的朋友们听说有狼人潜伏在一个巡演的马戏团里，他们乔装成马戏团的演员要探寻这其中隐藏的重大秘密。

　　Scoop-Doo and the gang investigates the mystery of a chain of jewel robbery's exclusively reported that the robberies where maid by werewolves. The team decides in going undercover as circus performers in order to catch the one/s responsible.