Leo felt his blood turn to ice. “I’ve lived here three years. I’ve never heard anything.”

Leo did it. His voice cracked on the second repetition, but he finished. The knocking stopped. The closet door creaked—not open, but sealed , as if someone had pressed a heavy hand against it from the inside and then pulled away.

“Because you never invited it to announce itself,” Sam said. “But you did. When you clicked ‘play,’ you basically rang the doorbell for anything that was already dormant nearby. Now—do exactly what I say. Go to your kitchen. Fill a glass with salt water. Place it in front of the closet. Then say out loud: ‘The portal is closed. You are not invited.’ Three times. No stuttering.”

From that day on, Leo’s channel had a new rule in bold letters: No unsolicited links. Ever. And he always reminded his viewers: Some portals are better left unclicked.

But then he heard it: three soft knocks from his hallway closet. Not the front door. The closet he never opened.