An old hotel. One rule: never answer Room 309. But when the front desk phone lights up with 309 at 2:17 AM—and a terrified woman whispers for assistance—the cameras show an empty hallway. Room 309 has been vacant for six years… so who’s calling?

In her apartment building, there’s only one rule: never open the door after midnight. She follows it—until the knocking comes anyway. By morning, a note waits on her door: ‘You almost let it in.’ And the lock isn’t the way she left it.