No.112 Baker Street is a dental clinic.
The clinic opens at nine in the morning and closes promptly at six in the evening.
At night, there is absolutely no one here.
But today was an exception.
At eight o'clock in the evening, faint footsteps echoed inside the pitch-black dental clinic.
The owner of the footsteps seemed unaffected by the darkness.
Without turning on the lights, he walked steadily, not bumping into anything.
He walked straight to the back of the clinic and stopped in front of an oil painting.
Then he reached out and pressed a certain spot on the painting three times.
The wall beneath the painting instantly split open, revealing a downward staircase.
Dim oil lamps hung on both sides of the staircase.
The light illuminated Chen Yang's average-looking face.
Chen Yang took a cigarette from his pocket, lit it at the corner of his mouth, and then walked down the stairs.
At the end of the stairs was a narrow, dark corridor.
