Coffy

After her younger sister gets involved in drugs and is severely injured by contaminated heroin, a nurse sets out on a mission of vengeance and vigilante justice, killing drug dealers, pimps, and mobsters who cross her path.

Currently you are able to watch "Coffy" streaming on Freevee for free with ads or buy it as download on Amazon Video, Apple TV. It is also possible to rent "Coffy" on Amazon Video, Apple TV online