Dracula (Mystery and Imagination)

A mysterious patient escapes from his cell and intrudes upon a small party hosted by Dr. Seward, referring to the guest of honor—Count Dracula—as "Master."

In conversation, it emerges the Count is sensitive to sunlight, has only recently arrived from abroad, and that Seward's fiancee Lucy finds him fascinating.

Dr. Van Helsing comes to consult on the case, and manages to hypnotize the patient, so he recounts in flashback events in Transylvania, including an attack by Dracula's brides.

Mina sees Lucy, unaware she is now a vampire, who insists she is happy and ecstatic, offering her the same "joy" as she bites her friend.

The movie ends with a shot of said ring and an image of Mina on it, now bearing fangs implying she became a vampire despite Harker and Seward's efforts.