Terrors of the night

For Brianna and Cole, it was just a summer job to get some extra cash. The job would be in the subways of New York, cleaning night shifts from nine to midnight. But what they didn't know there were some things planned for them. Someone had been watching them for a while, because they're gonna use them as their paw in their endgame. Suddenly strange things start happening in those night shifts, and soon enough Brianna and Cole are trapped in world of danger, and survival trying to get out alive.