Welcome to the World of Puzzles

Lu Qingsong was stimulated and suffered from a rare disease, delayed mood disorder. In order to treat it, he cooperated with the doctor's advice and began to try various methods to mobilize his emotions. Roller coasters, haunted houses, horror stories, adventure games... Until one day, he accidentally received a puzzle with a strange picture. A black background with a bright red fingerprint printed on it. The pattern was a little faded, as if it had been held in someone's hand and rubbed repeatedly. On the back of the puzzle, there is a line of small words written: Welcome to the world of puzzles. Lu Qingsong, who was about to change into pajamas and rest that night, appeared at the highway intersection and met six people waiting for him to get in the car. They told him that piece of the puzzle was a pass home...