Young Dongfeng Lin and Xifeng Can are very good brothers. But the cruel war separated them. In order to achieve temporary peace with Mars, the Earth Army handed over Xifeng Zan as a hostage to Mars. And the Mars base has been completely transformed! A few years later, Mars sent troops to destroy the earth's military strongholds. Can and Rin met again, but Rin was erased by the earthlings who broke their promise and can's memory...