Jack is an EMT* who's found himself at the other end of medical services. In the hospital, he experiences strange hallucinations (or are they real?): A guy looks eerily like how Mary Shelley described Dr. Frankenstein. Jack supposes the guy is from the bed next to his, but when he calls the nurse, the neighbor's bed is empty, the sheets and blankets neatly folded.
Next, Jack and Claire admire an older model ambulance. Claire and others seem to have passed away, but they attained power over their form. Jack's going to be the driver, for the supernatural.
* I think. It later says he went to medical school--a med school to be an EMT?