Sam and Dean meet a hunter with a dark past who needs their help. They soon discover that he has a connection to them, that they are not the first Winchesters she's met. Their family will never be the same. Rated M, but a soft M. Starts a little slow, but picks up so please bear with me. This is my first fanfic story.

Cas is dying. Castiel's grace is making him sick, weakening him, burning him out. Sam and Dean are holed up in the bunker, Dean taking care of his angel while Sam desperately searches for anything that might save him. The boys make one last desperate attempt to save their friend, unwittingly attracting the attention of an ancient warrior bent on revenge. Part 1 of 3.