Set in the late 1800s, this origin story follows Abby Walker, an affluent Bostonian whose husband is murdered before her eyes while on their journey out West, as she crosses paths with Hoyt Rawlins, a lovable rogue in search of purpose. Abby and Hoyt's journey takes them to Independence, Texas, a small town with a big future.

An FBI agent's family is taken hostage while she's on a flight to Washington, D.C., where she's forced to make a decision that jeopardizes the lives of her husband and son.