Abby is joined by rough and tumble outlaw Hoyt and Apache scout, Calian, when she revisits the tragic site of her life's demise in search of clues to help uncover the cold-blooded killer hiding in town. Meanwhile, new Sheriff Tom Davidson, and the town's loyal Deputy, Gus, are determined to track down the "mysterious" man responsible for the recent bank robbery. Kate badgers Hagan into doing the right thing, and Lucia finds a new friend - and discovers a surprising talent - in Kai.

Abby proposes a scheme to reroute the railroad away from Calian's tribal land. Tom finds the tables turned while attempting to take down his brother. Kate and Kai navigate their fractured friendship while Gus remains convinced that Tom is up to no good.