On Halloween night, the New England town of Salem, Massachusetts is being haunted by the ghost of the witch Milissa Wilcox, who was burned at the stake in 1778. After receiving a distressed call from their friend Arlene Wilcox, a descendant of the accused witch, the gang arrives to help, despite being warned off by the town's mayor. The gang realizes the witch looks exactly like Arlene. (thetvdb.com)