Will learned the truth about his birth during the Will Trent season 1 finale, which might have laid the foundation for a storyline in season 2. During the series premiere, viewers discovered that Will was abandoned as a baby, so he grew up in the foster system. It wasn't particularly kind to him, and he has the scars to prove it. However, his origin story is a little more complicated than once thought.
https://screenrant.com/will-trent-reveal-sets-up-storyline-season-2/