After the events with Deucalion and Jennifer Blake, Derek goes on a search for his biological family. He, Stiles, and Cora head to New York City to try to find the family he doesn’t remember. It turns out that there was a lot to his adoption that he never knew.

As if Sheriff Stilinski doesn't have enough to deal with, now he's been attacked by some enormous dog in the forest, and that's normal compared to what happens next... Re-telling of seasons 1-3B with Sheriff Stilinski being bitten instead of Scott.