Marcie Ducasse writes the "Wierd Happenings" column for Roaming New England Magazine, which focuses on stories of the supernatural that occur in New England. She researches strange happenings and explains them to her readers. Usually, the acts were performed by all too human means, although occasionally, a supernatural element remains unexplained.

In the case of the "Black Dog," a small black dog suddenly appears out of nowhere and then disappears. According to legend, whoever sees the dog three times dies. When a Wall Street financier, who is about to come under indictment for embezzlement, sees the dog three times and then falls off a cliff. Marcie is quick to investigate the case. She soon finds that many of the man's acquaintances are happy to see him dead, and it soon becomes obvious to Marcie that determining if he died due to human agency or the curse of the "Black Dog" will not be easy.