Fat Tiger is a stray cat. Because of his greed, he was caught by Li Zhi, a young man who moved to Beijing, and was forced to separate from his beloved little female cat Muna. So Fat Tiger began to try every possible way to escape! In this battle of wits and courage between cat and man, they gradually became familiar with each other and became close partners, spending an unforgettable year. In Beijing in 2012, under the oppression of the hinges of the city machine, the wandering young people found it difficult to control their own destiny, and the fate of stray animals was the same. They struggled and lost in their own "cages"... looking for the answer to happiness.