In the late Cretaceous, in what now is Shandong, China, dinosaurs were at their peak, many species have been extinct, but some species have evolved to the extreme, such as the Tyrannosaurus Rex family. The novel tells about the twists and turns between the Tyrannosaurus Rex brothers named Lu Ying and Lu Xiong in the Tyrannosaurus Rex family. In spite of misunderstandings and even hatred, they finally forgave each other and with their courage and mutual trust succeeded in saving the plain on which they depended and the fellows on the plain.