While the infant King of England is awaiting his rightful spot to the throne, the regent, Roderick (Cecil Parker) defies royal law and crowns himself King. To regain the throne the baby king must obtain the key to a secret tunnel that allows them passage to the castle. Rebel leader, Black Fox (Edward Ashley), devises a plan that includes infiltrating the castle disguised as a court jester to steal the key and place the rightful King in his position.