Lin Chuan has been the least favored child in his family since childhood. To support his older brother Lin Jianye through school, marriage, and starting a business, he dropped out early and began working, scrimping and saving for over a decade to send money home. But when the family received 800,000 yuan in demolition compensation, his parents gave every last cent to his older brother. All Lin Chuan got was one cruel remark: 'We'd be better off raising a dog than raising you!' Heartbroken, Lin Chuan walked away from home. To his surprise, nobody in the family came after him. Only Dahei, the loyal dog who had been by his side since childhood, broke free of his leash and chased after him. By a twist of fate, Lin Chuan activates the Beast King System, granting him the power to tame animals and share their natural abilities.