Shelf Life (2004)

Martin Remaro, while in hot pursuit of evil, is hit by a car. Ben and Julie (the occupants of the car) are convinced to flee the scene of the accident and take him home. Instead they take him to their place. Through a turn of events, they come to discover that Martin is a very troubled man. Wanting him out of their home, they agree to collect the drugs needed to help heal his wounds. Through the people they come into contact with while purchasing the drugs, they come to understand that he is a very sick man that needs help and that they are in danger.