In the early 1900s, an aging man living under the alias James Blackthorn resides in a secluded Bolivian village, far from the law's reach and his infamous past as the outlaw Butch Cassidy. Now yearning for a quiet life, he writes to his nephew in the United States, revealing his plans to return home after 20 years of hiding. As he embarks on this new journey towards a hopeful future, he encounters Eduardo, a young, desperate Spanish engineer who claims to have embezzled a fortune from a mining company and is now on the run from his employers and the relentless Bolivian authorities.

Despite his initial reluctance, Blackthorn agrees to help Eduardo recover the stolen money in exchange for a share of it, hoping it will fund his journey back to the U.S. However, the alliance forces Blackthorn to confront his long-buried past and the violence that once defined him. As they travel through the treacherous Bolivian landscape, they face numerous obstacles and pursuers, challenging Blackthorn's desire to live as a free man while testing their trust in each other. With each step, Blackthorn grapples with the legacy of his former life and the quest for redemption, raising the stakes for what lies ahead.