From the producer Martin Scorsese, “Revenge of the Green Dragons” looks at the real Asian gang that terrorized the streets of New York City in the 1980s and early 1990s.The story followed two immigrant brothers Sonny (Justin Chon) and Steven (Kevin Wu) who survived child poverty by joining the Chinatown gang “The Green Dragons.” The brothers climbed through the ranks quickly, which drew the attention of the New York City Police Department.