Lu Yan, a high school student, discovered that his shadow had an independent consciousness and could help him complete various things - cheating on exams and avoiding dangers. However, every time he borrowed the power of the shadow, the shadow became clearer and even wanted to replace his body. Under the threat of the shadow, Lu Yan met Lin Xi, a transfer student who could see the consciousness of the shadow. The two discovered the secret of "shadow symbiosis" and discovered that only by sincerely accepting themselves can they control the shadow.
