Legends of Amberland: The Forgotten Crown

Royal wizard finds out about an old crown that belonged to the royal family since generations. Yet, strangely no one ever heard about the crown and there was just a single mention of it in the royal annals. Upon further study he discovered that there has been cast a powerful spell of forgetfulness of unknown origin which caused everyone in the whole land to forget the crown ever existed. Without knowing who or why went into such trouble to conceal the existence of the crown he decided to investigate it. He summoned a party of noble heroes and tasked them with finding whereabouts of the mysterious crown and the origin of the spell.