When Harlan Carr inherited his Uncle Ebenezer's "Jack-O Lantern" house and too his bride there to live, he found himself the unwilling host of a score of hungry relatives within a week. Soon, strange things began to happen. A black cat made the house his headquarters, unexplained sounds could be heard and a shadowy figure floated through the halls at night.
Evelina Grey is the prettiest girl of the small community where she lives. Her sweetheart is Dr. Dexter, and they share a passion for scientific research. While they are both working in the laboratory one day, there is an explosion which renders Evelina unconscious. Concerned that her beauty has been marred, Dexter disappears.
Mary Ainslie has been waiting 30 years for her fiancé, a sea captain, to return. She has kept a light burning in her window to guide him home. His son Carl, by another woman, arrives on vacation in the New England village where Mary lives. Mary is overcome by the resemblance between the young man and his father. The young man falls in love with Ruth, Mary's young comrade. On her deathbed, Mary wishes Carl and Ruth the romantic life that she did not live.
