Sam and Dean Winchester, along with Sam's twin sister, Caitlyn, stumble across a case in New Orleans. The problem is...there are no connections to the murders. What supernatural being could be behind all of this? But during the hunt, Caitlyn finds out things aren't always what they seem. Rated M for smut, torture scene, language. (Sisfic) AU/season 5 (After 5x18 & Possible OC/OC).