Lu Chuan, a heavenly trial-taker, descends to the mortal realm and becomes the long-lost, pure-minded young master of the Lu family. Only his father Lu Zhendong and elder sister Lin Lan can hear his inner voice, making him the key to protecting the family. Stepmother Chu Lian colludes with adopted son Lu Ye, coveting the family property and repeatedly framing family members. Feigning ignorance, Lu Chuan uses his inner voice to reveal inside information, helping his family see through the conspiracies. He discovers that the real culprit who abducted him back then is the doctor Chen Youde, who plotted for years due to a personal grievance. Steadfast in kindness and justice, Lu Chuan joins hands with his family to gather evidence, publicly exposing all evil deeds and bringing the villains to justice. The Lu family returns to harmony, and Lu Chuan also grasps the true meaning of life through his trials in the mortal world.