Liu Housheng gets only an old yellow ox when dividing the family, yet discovers it can speak human words and foresee fortunes and misfortunes. Guided by the ox, he avoids forced purchases, escapes a collapsing house, and sees through his elder brothers' scheming, which also attracts covetous eyes from all sides. To solve the mystery, he finds his father's old friend, digs out an old ledger recording human favors and interactions, but discovers the most crucial page has been torn away by someone, and that page hides the final secret between his father and this divine ox.