A steady stream of mysterious letters led the young Shen Mengbai to move into the "Yellow Crane Tower" and meet the "Three Princesses of the Yellow Crane Tower" whom they had grown up with since childhood - the quiet and lovely Li Yu, the lively and cheerful Zhong Huihui, and the academically dominant girl Xu Jiaying. Those mysterious "empty messages" started a journey of growth with the small town girls - at the age of sixteen, their peaceful and happy life gradually began to change, and their fate began to reveal its cruel side. The secrets hidden in the empty letters caused all kinds of confusion in the hearts of adolescent girls, and they began to stand up against the world - a 16-year-old, sad girl who likes the flickering clouds in the sky. At the age of 16, a girl who desperately wanted to grow up began to practice being an adult. At the age of 16, a girl who has gained an awareness of "beauty" begins to care about the annoying acne on her cheeks. At the age of 16, the rebellious beast in girls is always clamoring: they want to peek at novels, admire good boys, complain about ugly school uniforms... They cry hard, laugh hard, and explore hard. At the age of 16, when I want to grow up but am afraid of growing up, I have seen both coldness and warmth, and finally gained the power of tolerance and bravery, and reached reconciliation with myself and the world.
