A secluded master leaves behind half of a token and entrusts Youyou with clues, sending her to the city to search for her long-lost family. By a twist of fate, she saves an elder from a wealthy family, and the token reveals clues to their blood ties. However, someone within the wealthy family plots to tamper with the DNA test results, setting off a series of complications. Using her intelligence, Youyou gradually clears away the layers of mystery and uncovers the truth about how the elder was forced to part from their family years ago. After overcoming numerous hardships and resolving the family's conflicts, the long-lost relatives are finally reunited.