极速生命力 Saturn (1999)

A son is stuck with caring for his Alzheimer victim father, a former professor who can now barely communicate. Depressed and struggling to make ends meet, an old buddy tries to get him to become a pusher. He gets further drawn in by a wild girl for whom he does procure drugs and gets involved in a wild sexual relationship. All of these factors weigh on the man until the inevitable conclusion is reached. Written by John Sacksteder.