17 Years ago, a construction worker accidentally fell from a building and died. His daughter (Ruirui) was adopted by the contractor, and her son remarried and moved away with his mother. The only token the siblings have is a pencil that their father broke off in half. Seventeen years later, with the help of her brother, Ruirui embarked on the road to find her mother and brother. In a strange city, among a group of strangers, she felt everything that seemed similar to her, and finally found that she was moving in a pre-set circle. The result was a destined tragedy. Before she died, she found her younger brother, but the younger brother, who was also suffering from family affection, didn't know that she was her sister...