Li Changhe returns to his hometown and learns that his eldest brother has passed away unexpectedly and his mother is gravely ill. His sister-in-law, Shen Yue'e, is struggling to make ends meet by selling her dowry, while the debtor Li Jingui wants to take away their ancestral home using an IOU and force Shen Yue'e to repay the debt with her person. To gather money for his mother's medicine, Li Changhe takes a firewood chopper into the mountains and encounters an attack by a Siberian tiger. Amidst the fight, he unexpectedly activates the Beast Contract System and subdues the Tiger King. Able to understand animal speech, he relies on contracted beasts such as the Tiger King, jays, and sables to harvest mountain goods. With extraordinary boldness and decisiveness, he pays off his debts, keeps his ancestral home, improves his family's life, and gradually develops mutual affection with Gu Mingzhu, a medicinal herb store buyer.