CineCalidad. Black Metal Veins unflinchingly documents the dark realities of despair and morbid self annihilation surrounding the lives of five heroin junkies. The addicts' intertwining stories of pain, loss, sadness, and abandonment lead the viewer down the agonizing and hideous path of horrifying psychological and spiritual destruction as the grim disease of heroin addiction infects and decays the bodies and minds of five young people.