The disk is found in the Presidential metro. Before boarding the train to the Adams Air Force Base, go up the opposite staircase toward The Capitol Building and you will find it next to a skeleton on a bench. It will start the unmarked quest The Sorrowful Suitor for receiving the all-nighter nightwear.
If someone finds this... please get this to my lover at the La Maison Beauregard Hotel in East Georgetown... he'll want to hear what I have to say. My darling... they've found me. I... I tried to get away... tried to get away so we could be together once again... I know you risked your life to get it to me.... combing the ruins, avoiding the Super Mutants... all for me. It seems I shall never lay my eyes upon your gift... you... you'll have to keep it and remember me every time you see it. I'm so sorry my darling... so... so... sorry I've let you down. So many have died for this thing... so many hearts have been broken. Please remember, I'll always love you... you will be with me forever in my spirit... I... I...l-love... you...
Behind the scenes
The narrator of this holotape was voiced by Jan Johns.