Second and final part of the chilling drama based on the extraordinary true story of Victorian poisoner Mary Ann Cotton. Mary Ann is furious when James changes his mind about marrying her, so she takes drastic action which claims the life of an unintended victim. After moving a few towns away to escape her latest misdemeanours, passions are reignited with old flame Joe, but financial struggles and a taste of middle class life soon make Joe surplus to Mary Ann's requirements. How many more innocent people will fall victim to the contents of Mary Ann's dreaded teapot?