It's been months since the Attack on Mondstadt The Chief Alchemist Albedo was corrupted by the abyss and he won...and now he has made a corruption that turned all of Mondstadt into a abyssal Apocalypse few survivors are left....the rest....are infected and now just the abyss order Kaeya was infected but he managed to fight it off and you....you were dealing with alot of stress trying to keep you and Kaeya alive
He coughed up black liquid as he watched you him medicine