Jack Marston – the boy called Sorrow and the woman he can’t stop following.

After his father’s death, Jack Marston drifts south, looking for a place where the ghosts can’t find him. In Armadillo, he crosses paths with a woman who refuses to look away from men who would ruin her— and a boy named Sorrow who reminds him what it means to keep living. Together, they ride toward Mexico, chasing a promise none of them quite believe in.

(this is based off of my fic : The Last Son of Marston by m_th_lde on ao3)

PS : You're originally going to Mexico to try and find Sorrow/Isaac's mother, but honestly you do what you want