At 11:11, the doorbell rang from under the floor.

Rina was alone in her grandmother’s old apartment. The hallway was empty, and the real doorbell beside the entrance had been broken for years.

She told herself it was a pipe, a neighbor’s television, or the building settling after midnight. Then it rang again, softer and lower, directly beneath the low table.

Rina moved the rug and found a narrow line between two floorboards. One board lifted when she pressed the corner.

Below it was not dust. There was a small brass button, fixed to a square of polished wood. Around it, the darkness looked too deep for an apartment floor.

A note was taped beside the button. The paper was yellow, but the handwriting was new.

If you hear it, do not answer first.

Rina’s throat went dry. Her grandmother had left many strange things in the apartment: old maps, locked boxes, photographs with no names. But this was different. This was waiting.

The bell rang a third time.

Rina held her flashlight over the hole. Somewhere below, a child whispered, “Is anyone upstairs?”

She should have closed the board. She knew that. Instead, she whispered back, “Who are you?”

The brass button glowed like a tiny sun.

A calm voice answered, “I am the person who lives under your tomorrow.”

The apartment became silent. The city outside kept shining, ordinary and distant.

Then Rina noticed the note had changed.

Second rule: never ask your own name.