Black Mercy

Consumed by a horrific event in her past, a woman is driven to violent retribution, and soon discovers that no amount of blood would be enough. Her only ally: a meth-making genius who manipulates her for his own ends while she wages a vigilante campaign against a powerful drug lord and his thug army. A detective, investigating a series of grisly homicides, begins to uncover the truth about her, and the role he himself played in her origins. But can he find her in time to stop the killing, and to save her from herself?