When Miranda Crabtree was still a child, her father died in the swamps. Since then, she has been smuggling charismatic preacher Cotton and a group of his followers - just to make ends meet and protect the old witch and the little foundling. But there are dark forces at work deep in the bayou, both human and supernatural. Miranda's life is about to turn upside down, because the insane preacher will give an unimaginable task and the girl will find out how far she will have to go and what she will have to sacrifice on this last journey.