That year, when people were approaching and the trees were mottled with shadows, 15-year-old Gao Fan said to 15-year-old Gu Nian under the witness of the setting sun: We can never quarrel or break up. You can't die in front of me. That year, dark clouds covered the sky and heavy rain poured down. The end of the college entrance examination brought not only the separation of graduation, but also the 18-year-old Gu Nian was no longer the Gu Nian she had been 3 years ago. She was the apple of the eye of the Luo family in the imperial capital, and had always been. She turned the entire imperial capital upside down, just to look for traces of Gao Fan who left without saying goodbye. She just wanted an explanation. That year, the moon and stars were sparse and the world was vast. Gu Nian went to the United States to study alone because of an unconfirmed gossip about Gao Fan: Gao Fan appeared at Harvard in the United States. Three years later, Gu Nian returned to China and let it go if she was tired. She silently made up her mind at the gate of Imperial Middle School, where she and Gao Fan were filled with memories, and let go. Gu Nian: Gao Fan, I want to ask you the last question, you... Gao Fan: Look, top students and experts in criminal psychology who have returned from abroad will also ask the most vulgar questions. A woman is the stupidest animal in the world. If she could ask the person she loved so much and put her to death one last question before she died, between why did you kill me and did you ever love me, she would definitely choose the latter. Blocking her dying hopes and risking her life with her eyes closed, the answers to the questions she asked may be the result of her efforts to escape, and no one can be exempted from this. Gu Nian, you too. Love is like a mountain, and mountains and seas cannot be leveled. There are roads to walk on the mountains and boats to cross the seas. This love can conquer mountains and seas, and all mountains and seas can be leveled.