Fan Shi is a goofball who has spent three years preparing for graduate school entrance exams and is still floundering. This year, he swears he’ll finally make it. But a hundred days before the exam, he accidentally activates a mysterious app on his phone: “Exam God Mirror.” It can create an identical “self-mirror” to study, take exams, and even live in his place. Fan Shi is overjoyed. He sends the mirror off to the study room while he lies flat and plays video games. The mirror lives up to expectations, sending his mock exam scores soaring. But Fan Shi doesn’t realize that the mirror is quietly taking over his life: flirting with the senior student he likes, picking fights with his friends, and even changing his application choices. Worse still, when Fan Shi tries to shut down the app, the mirror sneers, “You’re the mirror.” As the countdown to the graduate entrance exam ticks away, Fan Shi must reclaim his life and expose the ungrateful mastermind pulling the strings from behind the screen.