Song Zhiyuan unexpectedly gains the special ability to hear people's inner thoughts and is forced to take her elder sister's place in marriage, entering the Prince of Ning's household. Everyone fears the cold and taciturn Prince of Ning, but she alone can hear the deep affection and concern hidden beneath his stern exterior. Breaking free from the layers of constraints imposed by the Song family, she sees through the family's concealed selfish motives and schemes. Together with the prince, she investigates long-buried events, protects their loved ones, and exposes the traps laid by others. As they learn to trust one another and uphold the goodness in their hearts, they also build shelters for ordinary people struggling through difficult circumstances. Along their journey together, they develop a tender love that is wholeheartedly reciprocated, calmly resolving every conflict within the household and the imperial court.