When an estranged family member arrives in town, Abby finds her secret identity in jeopardy; Hoyt reconnects with his outlaw roots; Kai contemplates his future; Calian receives a dire warning that may drive him back to Independence.
Abby starts to question everything she thought to be true, much to the dismay of her friends. Kai thinks he's seen a ghost when an unexpected person from his past appears in Independence, which makes Kate suspicious.
As a dust storm descends upon Independence, Abby and Tom find themselves desperate for shelter. Gus has a lead that can potentially help Calian. Kate, Hoyt and Lucia work together, but things do not go according to plan.
Abby proposes a scheme to reroute the railroad away from Calian's tribal land; Tom finds the tables turned while trying to take down his brother; Kate and Kai navigate their fractured friendship; Gus is adamant that Tom is up to no good.
A series of letters that Gus writes to his late wife reveals the origin stories of Abby, Hoyt, Kate, Kai, Calian, and Tom, along with the role they all played in each other's destiny.
While Gus clings to life, Abby, Hoyt, Kate, and Calian must stop at nothing to expose Tom's true nature and end the Davidson reign over Independence once and for all.