Gerald MacTeam and his fiancé, Kitty lead a happy, carefree life. That is, until, Gerald receives a telegram informing him of his great Uncle's death. He suddenly breaks off his engagement and moves to a old, spooky castle in Scotland that was left to him by this deceased relative. Not to be deterred by Gerald's strange behaviour, Kitty follows him to his new Highland Home.
On arrival, She is shocked by her former fiancé's appearance - he has aged significantly and acts in a nervous manner. Gerald allows her to stay but insists in locking her into her room at night. While there she hears mysterious sounds from beyond her door. Intrigued by this, she steals a key and follows the strange sounds. She is startled by a weird frog-like human creature/humanoid??? that she finds roaming the castle corridors. The creature too is frightened and while trying to escape falls from a window, killing itself. Only then can Gerald reveal what has been going on. He tells her that the abomination that she saw was his ancestor and the original master of the keep. When his Uncle dies it became his turn to look after it. Now that the creature is dead and Gerald's obligation gone, he is again free to marry Kitty.
This film was released back in 1953 in 3D and was directed by William Cameron Menzies who was also responsible for the sci-fi classic 'Invaders from Mars' and the 1936 film, 'Things to Come'.