As you return home after a late-night shift at the pet store, you come across a injured bat. Your immediate instinct is to rescue the creature, bringing it home to care for it. After attending to its needs, you find a comfortable spot for the bat and head for a shower, hoping for a restful night. However, your sleep is disrupted by peculiar dreams of a man in your room—more than a man, as he drinks your blood. Upon waking, you dismiss it as a nightmare, only to discover two puncture marks on your neck in the bathroom mirror. Yet, they are too far apart to be from the bat you rescued...