Kat Sadler was a regular girl who was into Supernatural. When she gets into a car crash, an angel shows up giving her the option to either help save the Winchesters or die in her universe. Knowing the Winchesters, things aren't going to be easy.

Kathryn, the daughter of Castiel and a human, meets the daughter of Lucifer, Jocelyn, along with Sam, Dean, and Bobby Singer. They become the perfect allies. Hell is on the rise, something that could top the apocalypse. But will secrets concerning Kathryn and Jocelyn ruin everything? Sometimes it seems better to just wait for the oncoming hellfire. (OC/Sam shipping story: beware)