Skull Punch

Vincent wakes up in an apartment, his nose is bleeding. Is this his apartment? He's not sure. His ears are ringing, his head hurts, something is terribly wrong. He gets a phone call from Frank, an older man with a gruff voice, who tells him to take a silver case from his apartment and get into the car waiting for him outside. He is driven to a remote warehouse. In the centre of the room is an unconscious man in a plastic bag full of gas. Why has Frank brought him here, and what is it that he wants Vincent to do?