New York – the city that never sleeps, where bright lights always cover the night sky. But here, deep underground, there exists darkness that the lights cannot reach.

On a cold November evening in 2006, the subway line 6 rolled out of Brooklyn Bridge station at 11:32 p.m. Among the last passengers that day, a man named Eliot Carter – 38 years old – boarded the train with a leather briefcase and never returned.

Strangely, according to camera data and reports from the MTA (Metropolitan Transit Authority), Eliot boarded the train but there was no recording showing him leaving the car. No one saw him stand up. There was no blood, no cry for help, no collision. The man seemed to… disappear into thin air.

The police got involved, searching every station, every track, every old tunnel. They even investigated the “ghost tracks” – sections of track that had been abandoned since the early 20th century, where it was rumored that a “dark underground” existed – where lost souls were trapped.

Eliot was an architect, living alone, with no debts or grudges. But in the diary found in his apartment, the last line was written in a shaky handwriting:

“I heard a voice calling from the old tunnel… It wasn’t an echo. It was waiting for me.”

Some believe that Eliot found the entrance to a secret tunnel that led to a parallel world. Others believe that it was a cover-up – an accident covered up to protect the reputation of the city’s transportation system.

Whether fact or urban legend, the story of Eliot Carter is told amid the rumble of passing trains, a reminder: New York is not all light. Under our feet, shadows whisper.