25-year-old Danny Hill just got the opportunity of a lifetime. When his grandmother dies, he finds out he may be able to take over the lease on her sprawling rent-controlled apartment on Manhattan’s posh Upper West Side. The doorman and a lawyer convince him to lock himself in for 12 days, the time it will take to get the lease legally changed to Danny's name. If he leaves the apartment, the landlord will most certainly not let him back in the building; they would go to great lengths to get market-rate tenants in there. Desperate not to return to his dump in Queens, Danny agrees. But once he's locked in, Danny begins to hear strange noises. And unexplainable events start happening in apartment 1003: things he's thrown away reappear, uninvited visitors show up at his door, while welcomed guests vanish unexpectedly. Danny may not be the only OCCUPANT. Perhaps he should have stayed in Queens.