Xiao Wentian is originally a hidden master endowed with extraordinary skills. Because of a marriage contract, he comes to Jiangzhou and becomes a "live-in son-in-law" despised by everyone in the Su family. Facing outside contempt and questioning, he keeps a low profile with forbearance and silently guards the Su Group. The cold and proud female CEO Su Qingying initially rejects him in every possible way, yet discovers through crisis after crisis that this seemingly cynical man can always turn danger into safety at critical moments. As business war competition escalates, various forces continuously apply pressure on the Su family. With his superb medical skills, extraordinary wisdom, and extraordinary abilities, Xiao Wentian helps the Su family break through difficulties and resolve crises, gradually winning everyone's recognition.