Alejandro Hernandez returns from Iraq, to learn his father owes a large debt to a group of gangsters who run illegal underground races. Keeping a promise to his best friend who was killed in the war, Alejandro looks up his buddy's wife Luisa. They soon fall in love, without realizing they're both caught up in the same dangerous web. Secretly, Luisa races to make enough money to support her child, Alejandro does so to pay back his father's debt and to keep his family safe from the threats of El Guajo, and his unpredictably violent nephew, El Chulo.