Spiritual energy outburst descends upon the city, and all kinds of animals begin to mutate wildly. Even the coquettish Teddy dogs suddenly surge in size by three times overnight, becoming fierce beasts attacking humans. In Xia Qing's home, the chubby tabby cat Sangbiao watches TV news and realizes that a new era belonging to animals has come. Unwilling to continue being a pet called 'Mimi' who relies on acting cute to eat cat strips, it is determined to prove that cats are the king of beasts.