Burt is killed by a mobster for some reason, and Kurt disappears. He goes off and becomes a total BAMF, a spy and thief. There's a part where he saves a cop or DEA guy and two kids held hostage in Mexico, and he's a patron saint to the working girls and boys in certain parts of the US, and it all ends when one of his aliases (a woman, possibly named Elizabeth?) is called in by the gangster who killed Burt to help fix something.
I'm pretty sure Karofsky was either a cop or FBI, and after he takes down the mob boss, Kurt shows back up in Lima and stays with Finn. Puck's glad to see him, Santana chews him out, and there's hints of Klaine at the end.
Please help? I've searched all over and had no luck. Does this sound familiar to anyone?
Also, I hope my tags are in order. If not, let me know and I'll fix them.
*FIC HAS BEEN FOUND! Thank you!