When L.A.P.D. Detective Diego Hernandez is assigned a career-making case investigating a vicious cartel, he uncovers links to his brother's supposed suicide and a turf battle that's about to swallow his neighborhood. Torn between playing by the book and seeking justice, he resurrects the masked street legend . Now, out to take down his childhood buddy turned gang boss, he sets off a bloody war to defend his city and avenge his brother's murder.