He Xiaoqi, who has just entered youth, has a twin sister. They have been dependent on each other since childhood, and their relationship is naturally perfect. But one day, the younger sister has to leave her elder sister and run to Hong Kong to make a living. Fate keeps playing tricks on the sisters. When the younger sister is full of joy, When she returned home happily, everything had changed. Things and people had changed. Her sister, who had been in poor health since childhood, unexpectedly contracted encephalitis and soon passed away. Therefore, her sister, who felt something was fishy, embarked on a road of no return for revenge... Will her life change like this? Who will she find to pay for her sister's death? The answer is about to be revealed to you...