The Mustang (2019)

Roman is a convict in a rural Nevada prison who struggles to escape his violent past. As part of his state-mandated social rehabilitation, Roman is required to participate in an "outdoor maintenance" program. Spotted by a no-nonsense veteran trainer and helped by an outgoing fellow inmate and trick rider, Roman is accepted into the selective wild horse training section of the program, where he finds his own humanity in handling an especially unbreakable mustang.