Derek Hale is a member of the Hale family and was born as a Werewolf. After a fire destroyed his home and killed most of his family years ago, Derek left Beacon Falls. However, the murder of his sister drove him back.
Derek grew up as the son of Talia Hale, a powerful Alpha. At the age of sixteen, he became romantically involved with an older woman named Kate Argent. However, he was unaware of the fact that she was a Werewolf Hunter and was only using him to get information on his family. She eventually started a fire that destroyed the Hale home and killed most members of his family. Derek survived because he was not present at the time and left town with his sister.