When Heaven fell, Y/N fell with it. Unlike most angels, Earth isn’t unfamiliar territory. After spending decades alongside Castiel carrying out Heaven’s will, she knows exactly where to go when she’s cast from Heaven—straight to the Men of Letters bunker. Reuniting with Castiel is the easy part. Meeting Dean Winchester is not. With the Mark of Cain slowly consuming him, Dean doesn’t trust angels anymore, and Y/N has no patience for arrogant hunters with anger issues. Forced to live under the same roof, the two clash at every opportunity, turning every hunt and every conversation into a battle of stubbornness. But as Heaven crumbles, monsters grow bolder, and the darkness inside Dean worsens, the line between enemies and something more begins to blur. Sometimes, the last person you’d ever expect to save you… is the one who fell from Heaven.