Since losing her husband, Sophie has struggled to manage grief, a full-time job, and parenting her devastated daughter, but when a former physicist reveals a secret time-bending machine, Sophie will be faced with an impossible choice.

Aging sidekick Lefty Brown has ridden with Eddie Johnson his entire life. But when a rustler kills Eddie, Lefty is forced from his partner’s shadow and must confront the ugly realities of frontier justice.