Spoiler. We learn only how it got its bite and what it had with her friend up. Furthermore, by the second act as zusammenflickte after he fell Joel in the iron bar.
Another star, I regret as some previously due to the too-short story. For 15 I would have expected a little more like 163min Game Pass on the difficulty level "Survivor". Before some may say, I would have run only through the game, which is said, which were found in the number of minutes 13/14 collectibles.
Conclusion: Short insight into an interesting background story, but I would not fork out again for 15.