What starts out as a voyage to the West in pursuit of the American Dream quickly turns deadly for the Donner party after a series of bad decisions and severe weather. Trapped in the Sierra Nevada Mountains, this group of nearly 80 settlers fell prey to sub-zero temperatures, torrential rainfalls, extreme heat, and ten-foot snow drifts. Punishing storms trapped the party with nearly no food or shelter for 5 months in the Sierra Nevada mountains. Many died, some succumbed to cannibalism to survive, and others delved deeply into their faith while waiting to be rescued. “The Donner Party” explores this exciting journey through a hybrid of first-person narration, remarkable reenactments, expert interviews, CGI, and archival materials.

Based on the true life experiences of poet Jimmy Santiago Baca, the film focuses on half-brothers Paco and Cruz, and their bi-racial cousin Miklo. It opens in 1972, as the three are members of an East L.A. gang known as the "Vatos Locos", and the story focuses on how a violent crime and the influence of narcotics alter their lives. Miklo is incarcerated and sent to San Quentin, where he makes a "home" for himself. Cruz becomes an exceptional artist, but a heroin addiction overcomes him with tragic results. Paco becomes a cop and an enemy to his "carnal", Miklo.