Sanguine (2017)

After a tragic car accident, Markus loses his teenage daughter, Violet, due to a lack of blood for a transfusion. This turns him into an obsession of collecting blood for the hospital from those who don't deserve it. His obsession grows stronger and stronger as he meets a beautiful nurse who he delivers the blood to every day. He builds a relationship with her, though She starts asking questions which lead to him showing her what he does and why he does it. A twisted man, kidnapping drug addicts from hospital beds to drain them of their blood so the same thing never happens again.