Retired Detective Mac O'Hara returns to the St. Louis Police Department to help solve a murder, only to find out there are four bodies and about to be more. The evidence points to implications of voodoo and black magic. But, the investigation takes on a new light, when Mac's wife is kidnapped. Set in 1890's St. Louis, where serial murder, revenge, and the occult, all add mystery and intrigue to the Mound City Serial Murder File.