Master Zhao is about to kill his old ox, which has plowed his family's land for decades. Lao Shi spends five years of savings to save the old ox that has accompanied him for twenty-three years, only to be driven away by the heartless landlord, left with nowhere to turn. Late at night, the old ox speaks, taking him to the barren Black Stone Slope to grow five-colored divine grain overnight. The landlord forcibly occupies the wasteland and farms wildly, only to find that the divine grain turns into stone once it leaves the slope. The divine ox protecting the grains exhausts its immortal power to punish the greedy landlord, its immortal body scattering into five-grain seeds, leaving only fertile land. Lao Shi distributes the fertile fields to the poor people, while the greedy landlord loses all his wealth and begs in madness, confirming that good and evil ultimately receive their due rewards.