When a blind assassin comes to town, Angel tries to get he imprisoned but Lindsey of Wolfram & Hart gets her off.  Later, when Lindsey learns that her next targets are children, he enlists the aid of Angel to stop her.  Durung the process Angel recovers secret files from Wolfram & Hart and also acquires a scroll that deals with a prophecy about him.  Apparently Lindsey's change of heart is short lived as he goes back to work for Wolfram & Hart after the whole thing is over.