Shen Jinshu, the legitimate daughter of the Grand Princess, unexpectedly awakens a special ability after suffering a fall: she can only speak the truth. Upon returning to the capital, she inadvertently exposes one secret after another, causing everyone to avoid her. Yet Xiao Yan, the cold-faced heir of a noble family, is undeterred by the rumors and takes the initiative to propose marriage. The two join forces, facing all kinds of scandals and rumors while gradually falling in love. Shen Jinshu uses the truth to expose falsehoods and conspiracies at court, stays true to her principles, and distinguishes right from wrong. Through their honest and sincere relationship, she finds genuine love and ultimately protects the peace of the nation, finding a devoted companion for life.