Set in a small town in the early 1900's, Heads Deacon Tails Devil is the story of Robert Grant, an elementary school teacher and long-standing deacon and spirit-stirring soloist at Nazarene Baptist Church, who shows his best side to his adoring, unsuspecting public, but is the devil incarnate at home. Rachel Grant, who, as a young woman, married Robert against her mother's advice and was sorry for it from her wedding night on, tries her best to shield herself and her five children from Robert's devil side. But, Rachel's strong and wise mother, Mom Maggie, has to step in. With her prophetic gifts, cunning and mother-wit, Mom Maggie fights Robert every step of the way and tries to give her daughter and grandchildren a happy, normal life. As he becomes increasingly frustrated with his ability to control his family and his life, Robert's devil side grows stronger, and Rachel and the children suffer horribly because of it. Blaming Rachel, the children and Mom Maggie for anything he doesn't like about his life, Robert turns to other women to ease his mental and physical needs. As Robert tries to destroy one life in hopes that another will satisfy him, Mom Maggie and Rachel plan to show Robert that the devil "is" a liar.