When Miranda Crabtree was still a child, her father died in the swamps. Since then, she has been smuggling goods to the charismatic preacher Cotton and his group of followers to make ends meet and protect the old witch and the little foundling. But deep within the bayou, dark forces, both human and supernatural, are at work. Miranda's life is about to be turned upside down as a mad preacher gives her an unimaginable task and she learns how far she will have to go and what she will have to sacrifice on this final journey.