The eldest daughter of the Zhu family is to marry into a local family. Just as she is preparing to wed a wealthy young master, the only keepsake her mother left her, a pigeon-blood ruby called Spring in a Cage, mysteriously disappears. The clever and quick-witted second daughter of the Zhu family, Zhu Yue, sets out to find clues and recover her sister's precious jewel. Accompanying her is Chen Zao, a cool and distant woman shrouded in mystery, whose past is unknown. Their investigation reveals that the thief seems to be a child of seven or eight, yet they search the whole area without finding a trace. As the mystery deepens, one strange clue after another comes to light. What is the truth? Let Zhaozhao tell you.
Theme: Leave no regrets and cherish the present.
Is this a sequel to another book?