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--"The moon on the sea is the moon in the sky, and the person in front of you is your sweetheart." --"Do you believe in God?" "I never believe in God, I believe in you." --"If you don't meet each other in life, it's like participating in business. My name is Song Canshang." ........................ Lin Wangshu, the provincial champion who was admitted to a key university in Yuncheng, his boyfriend Song Canshang who was admitted to the same university, and his junior high school best friend Yu Xingnian. The three of them lived an ordinary and fun life in college, but their beautiful life was interrupted by a serial murder case. The real murderer cannot be found no matter what. Lin Wangshu's uncle Lin Nan, as the captain of the criminal police, is trying his best to catch the murderer. What kind of secret is hidden behind the case? What kind of help can Lin Wangshu provide? Readers are asked to pay attention to details and find the secrets of the three people.