A young street artist in East Los Angeles is caught between his father's obsession with lowrider car culture, his ex-felon brother and his need for self-expression.

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.

Courtney Whitmore, a smart, athletic and above all else kind girl, discovers her step-father has a secret: he used to be the sidekick to a superhero. "Borrowing" the long-lost hero’s cosmic staff, she becomes the unlikely inspiration for an entirely new generation of superheroes.