In a world dominated by synthetic biological "beasts", people hold a magnificent non-human arena competition.
In an unknown small village, the protagonist Yan Li loves to train beasts to fight.
He used the money he saved to buy a genetically modified beast with a strange structure-"Ao", and through a battle of disparity in strength in an underground beast fighting ring, he gained the appreciation of Master Jeff who was watching.
Yan Li, who learned the Lie Zhen boxing technique from his master Jeff, embarked on a journey and participated in championships held in many countries, moving towards the goal of becoming the strongest fighting king.
Intention: Break the rules, put hard work first, even small people can fight against fate
