In 1992, Mercer is desperately trying to rebuild his life and his relationship with his son amidst the turbulent Los Angeles uprising following the Rodney King verdict. Across town, another father and son put their own strained relationship to the test as they plot a dangerous heist to steal catalytic converters, which contain valuable platinum from the factory where Mercer works. As tensions rise and chaos erupts, both families reach their boiling points when their worlds collide.

After fighting his demons for decades, John Rambo now lives in peace on his family ranch in Arizona, but his rest is interrupted when Gabriela, the granddaughter of his housekeeper María, disappears after crossing the border into Mexico to meet her biological father. Rambo, who has become a true father figure for Gabriela over the years, undertakes a desperate and dangerous journey to find her.