Horror of Dracula

Jonathan Harker, a student of vampires, ventures to Dracula's castle and attacks him. The revengeful vampire leaves his dark abode to prey on the family of his attacker's fiancee. The only man able to protect Harker and his fiancee is Dr. Van Helsing, a friend of Harker's. As a fellow-student of vampires, he's determined to destroy Dracula. (official distributor synopsis)