The episode opens with the injured detective being rushed into the Emergency Room, where he is declared dead. However, Nick is a vampire. Though comatose, he is actually still alive. His friend, Natalie Lambert secretly feeds him blood; and this is sufficient to speed his healing to a degree noticeable by the medical staff. He is therefore admitted to the hospital as a patient.
Nevertheless, some cover-up is required: in particular, there are the X-rays of his skull, which clearly show a fatal bullet wound; and there is the doctor who has seen the X-rays. Nick's master, LaCroix deals with this by substituting X-rays of an uninjured skull and hypnotizing the doctor into believing that the bullet had merely grazed Nick's head without penetrating the bone.