A car accident ruined the happiness of two people and ended their happy childhood. A misunderstanding buried seven years of friendship. "The age of eighteen is a sharp turn in growth. It is an unknown coming-of-age ceremony and an ever-changing myth." Seventeen-year-old Tang Xueran gave this sentence to her best friend in her life, but in the next second, she turned that corner and saw the result waiting for her. One by one, misunderstandings, intertwined with each other, destroyed the good things in the past to pieces. It was these misunderstandings that pushed their crystal love into irreversible danger. This world is real and there will be no beautiful vows like "If you do not leave, I will in life and death".