22-year-old Kiera Zafra is living a mundane life independently, with a job that pays the bills. One day, after her shift in graveyard schedule, she's starting to hear unusual noises at the neighboring window from the apartment building next door, when she knew that no one has been occupying that room for the past six months, nor she saw someone moved there. What could have that 'something' Kiera has been hearing next door?