Cold and Dark

When Detective Mortimer Shade is somehow killed in a freezer, a parasite called a grail possesses his body, revives him, but he needs blood to stay alive. His partner John Dark accepts the new situation and together they become vigilantes, judging and killing the bad guys, with Shade sucking their blood with his claw. However, Dark notes that Shade is losing the rest of his humanity and becoming a monster, being aware and afraid of the danger Shade represents to mankind and trying to stop him.

Cold and Dark is a 2005 crime horror movie directed by Andrew Goth, starring Luke Goss, Kevin Howarth, Matt Lucas. It holds an IMDb rating of 3.9/10 from 1,053 votes and runs 1h 34m.