England, the 17th century. The time of Oliver Cromwell’s Protectorate.
After an unsuccessful attempt to restore the throne, King Charles II Stuart becomes an outcast in his own country. Disguised and using a new name, he, accompanied by only one loyal supporter—the young Julian Gredham—tries to escape to the Continent.
Accidentally finding himself in a church where a fanatical priest has driven his congregation into frenzy, Charles and Lord Julian prevent the mob from tearing apart the two daughters of Baron Robsart. In gratitude, the young ladies invite their rescuers to St. Priory Castle. However, neither the royal fugitive nor his companion knows that a terrible curse hangs over the castle—and that death has taken up residence there.