Callie is a young woman in college, but working nights as a cleaner for a local law firm. She loves her job, because she has the whole place to herself and is able to listen to music while she works. Everything is going fine, until one night she comes across a body slumped forward at a desk with a knife in his back.
She hears a voice, and instead of hiding, she panics and runs. He hears her and takes chase. She finds a young man working overtime, and they find solace in each other's arms, as the killer draws closer with each breath that they take.