《动物世界》改编自日本的漫画《赌博默示录》。该剧的主人公郑开司，平时没事的时候会装扮成小丑在游戏厅里面兼职打工，亲生父亲的离奇失踪，母亲卧病不起，让本是不富裕的家庭雪上加霜。他的发小令他背下巨款，面对着病床的母亲和一直等待自己的青梅竹马刘青，他决定踏上一艘轮船改变命运还清债务。这时一个神秘人告诉他只要参加船上的游戏就可以拿到钱财，为了家人的更好生活，郑开司同意加入生存的游戏，一场生与死的较量就这样拉开了序幕。船上的人们互相诈骗，暴露自私的一面，最终将游戏沦为斗兽场所。最后，郑开司十分相信自己的同伴进入小黑屋，但在利益面前，同伴选择了后者，郑开司凭借自己走出黑屋，并用钱赎人，游戏的计划人员又一次找到了郑开司

"Animal World" is adapted from the Japanese manga "Gambling Apocalypse". The protagonist of the play, Zheng Kaisi, usually dresses up as a clown and works part-time in the game hall when he is free. The mysterious disappearance of his biological father and the sickness of his mother make the family even worse. His childhood made him bear a huge sum of money. Facing his mother in the hospital bed and his childhood sweetheart Liu Qing who had been waiting for him, he decided to embark on a ship to change his destiny and pay off the debt. At this time, a mysterious person told him that he could get money as long as he participated in the game on the boat. For a better life for his family, Zheng Kaisi agreed to join the game of survival, and a contest between life and death kicked off. People on board cheat each other, reveal their selfish side, and finally reduce the game to a bullfighting arena. In the end, Zheng Kaisi believed that his companion entered the small black room very much, but in the face of interests, the companion chose the latter. Zheng Kaisi walked out of the dark room by himself and redeemed him with money. The game planner found Zheng Kai again Division..