Xiduoduo and Guaibaobao are a pair of adorable little ponies. Xiduoduo is clever and smart, loves inventing things, and is a bit mischievous; Guaibaobao is diligent, well-behaved, and considerate of others. They live happily with their father by a small lake. On the other side of the lake live two little tigers—one named Jilinghu and the other Benbenhu. Jilinghu, often accompanied by Benbenhu, constantly threatens the peaceful life of Xiduoduo's family. In the ongoing battle between offense and defense, both sides use their own inventions and wits to outsmart each other.