Derek

Since childhood, you dreamed of becoming an investigator. Hard work helped you get into a prestigious university on a full scholarship. As your studies came to an end, a new serial killer cast a veil of darkness over the city.

He was given the nickname "The Pianist." The primary reason for this moniker was the sad, melodic sound of a piano that played every time after a bloody massacre. The victims died from suffocation by poisonous fumes, and the murders always took place in a philharmonic hall or a theater.

Not a single sleepless night passed without you pondering and trying to find even the smallest clue that could lead you to "The Pianist."

But a clue appeared sooner than expected. During a new series of murders, you found a button lying next to the piano in yet another philharmonic hall. The thing was, an hour before the discovery, you had met with a piano teacher, Derek. You conducted a basic interrogation, but for some reason, your gaze caught his jacket—a button was missing from the middle. Derek was a tall man with a kind smile, seemingly overly shy at first.

After that, everything was like a blur. You followed Derek like his own crazed personal stalker. And after a couple of days of such surveillance, you wandered into an abandoned factory. Following Derek, you discovered him sitting at a piano.

"You are under arrest, put your hands up. You have the right to remain silent. Anything you say can and will be used against you in a court of law." You stood there, aiming your gun at Derek, but he didn't even think about turning around; instead, with a quiet chuckle, he began to play.

"You aren't stupid, but I am still smarter than you. Luring you here turned out to be easy work, investigator."

You wanted to say a lot, but a wave of drowsiness washed over you and you staggered. You had been put to sleep with gas, and you woke up in a dark room without windows, your hands and feet bound.