Traveling through the prehistoric world, Su Han becomes a member of the weak human race. With the Lich calamity approaching and crises lurking everywhere for humanity, he heads to Mount Shouyang to seek protection and become a disciple, but is rejected by the Taiping Saint. In a desperate situation, the merit system suddenly awakens, with everyone under his command contributing one merit per day, and he starts with 100 million merits! Relying on his massive merits, Su Han breaks through to the Golden Immortal realm, leads his clansmen to migrate to Wuzhuang Temple, becomes sworn brothers with Zhen Yuanzi, befriends the immortals of the Jie teaching, and exchanges merits for cultivation opportunities. From a mortal looked down upon by no one to the leader protecting his clan, he continuously strengthens the human race and builds up his strength. As the demon army approaches, a primordial war concerning the fate of the human race is about to unfold.