"You hold the flame and turn it into heavy snow." This is Gu Ziyu's favorite saying from Bei Dao. He is a policeman and he is a soldier. From acquaintance, acquaintance to falling in love, they have gone through all the processes that lovers should go through. They thought they could cling to each other for a lifetime, but Jiang Chongjie died in the line of duty one winter, taking away all Gu Ziyu's love and hope. She was seventeen and he was twenty-nine. The twelve-year age difference did not become an insurmountable galaxy between the two. Gu Ziyu originally thought that they could overcome everything, but they couldn't keep the one they wanted to keep. Jiang Chongjie finally turned into heavy snow and guarded silently. They have everything, but this world still owes Gu Ziyu Jiang Chongjie...