A look at a seemingly placid New England town that is actually wrought with illicit affairs, crime and tragedy, all told through the lens of Olive, whose wicked wit and harsh demeanor mask a warm but troubled heart and staunch moral center. The story spans 25 years and focuses on Olive's relationships with her husband, Henry, the good-hearted and kindly town pharmacist; their son, Christopher, who resents his mother's approach to parenting; and other members of their community.

Each season of this horror anthology series follows a different group of kids, members of the Midnight Society, as they discover terrifying curses and creatures.