Quest Schultz's Composer's Secret

There was a rumor that a famous composer had been murdered in one town. But you did not believe this story and decided to check it out. Arriving at the composer's house, you will find out that there were already detectives and policemen here before you, but they disappeared after the composer. When you enter the house, you find yourself locked. Your task: to unravel the mystery of the composer's disappearance and get out within an hour. Fortunately, the detectives left clues that will help you. Time has gone. Good luck!