Ninja Turf

Ninja Turf aka Los Angeles Streetfighter and L.A. Streetfighters is an 1986 martial arts film, starring Jun Chong and Phillip Rhee. Loren Avedon, Thomas F. Wilson, and Peter Malota appear in this film in small roles.

When the boys are asked to do security for a rich businessman, Young learns that his new client is actually one of the biggest drug dealers in the city. After the party, while the dealer is with his girlfriend, Young takes the briefcase of money the dealer scored on the deal and runs off. Angry, the dealer hires two hitmen, a master Ninja named Yoshida and a New Yorkbased martial artist named Kruger. The hitmen confront Chan and his men, yet Chan decides to help them locate their hideout. Mark, Frank, and Darrin are all kidnapped and tortured. While Tony is at home studying, Young proceeds to take out the syndicate. He kills Yoshida but is slightly injured in the process. He defeats Kruger by breaking his knee.On his way back with the very injured Mark, Frank, and Darrin, Young is confronted by Chan and his gang. Finally realizing her mistakes, Youngs mother tells Young she is sorry and that she loves him. However, Chan proceeds to hit Youngs mom and Young is mortally wounded in a fight. Tony, looking for Young, finds his fallen friend and goes on a rampage. Taking Youngs wooden sword, he proceeds to defeat Chans gang and mortally wound Chan himself with a strike to the head with the sword. As Youngs mom and Tony run towards Young, Young passes away in their arms and the two grieve as daylight hits Los Angeles. ........

Source: Wikipedia