Five years ago, Lin Xiao was the God of War in the North and had outstanding achievements. However, he was framed and forced to retire. In order to investigate the truth and to protect a promise, he chose to marry into the Su family and became a good-for-nothing son-in-law that everyone laughed at. In the Su family, he suffered cold looks and ridicule, but he always silently protected his wife Su Wanqing. As time went by, he discovered that there were also undercurrents surging within the Su family, and there were dangers everywhere. In order to protect Su Wanqing, he had to gradually show his strength. In crisis after crisis, Lin Xiao not only uncovered the conspiracy of the year, but also won Su Wanqing's sincerity. In the end, Lin Xiao returned to the top, protected his family and loved ones, and realized his self-worth.