The plot developed from a story by screenwriters Jack Ng, Sunny Chan and Su Liang is all fluff. Each character is significant, over-the-top, but appears realistic.
The film hooks you with excellent performances and brilliant voice-overs from its ace cast. How their paths merge, forms the crux of the tale. They set out to find their 'son' with the help of Yun Qing (Yo Yang), the seemingly righteous leader of a monster hunters' guild.
They regret their well-intended decision and long to be united with him. Meanwhile his foster human parents - Xiaolan (Bai Baihe) and Tianyin (Jing Boran) miss him. In the human world, Wuba strikes up a friendship with Tu Sigu (Tony Leung) a small-time rogue who is addicted to gambling and his monster buddy Ben-Ben. So he once again crosses into the human world. After the cute and cuddly Wuba (the young, four-armed, radish-faced, baby monster prince) is now settled among his people in the Monster Realm there are evil forces that try to capture him. The film takes off from where it left in its first edition.