On the grand opening day of the city's opera house, amidst the echoing melodies of Tchaikovsky, a silent crime occurred. Maestro Jalal, the strict and universally despised orchestra conductor, was found strangled with a silk curtain cord inside his private dressing room. The room is completely soundproofed and locked, with no windows. The crime took place during a busy afternoon of final rehearsals, with everyone inside the building preparing for the performance.
Accessing the Maestro's room requires passing through a single, long corridor. Despite the presence of many people around the premises, the killer seemed to be a ghost, leaving no trace. The timeline is precise: the body was discovered at 5:00 PM, and none of the suspects left the building between 3:30 PM and 5:00 PM.