With questions continuing to surface, Abby digs deeper into her husband’s past while Gus and Calian follow a hunch which has them questioning a former mentor and Calian accused of a heinous crime. Back in town, Tom puts together a Fight Night in an attempt to impress a railroad executive despite Kate’s protests, Hoyt dives into helping the Reyes family, and Kai reveals he knows how to throw a punch.

Through a series of letters Gus writes to his late wife, the origin stories of Abby, Hoyt, Kate, Kai, Calian, and Tom are revealed along with the role each played in each other's destiny.