At the end of the Southern Song Dynasty, Meng Yuanshan happened to meet Shen Yunan and Lechen in Lin'an. The friendship they thought they could maintain with each other as young people was separated by the war. However, in the face of attacks from aliens, when human beings face life and death, all grudges and wars no longer exist, only those who share the same hatred and the enemy walk hand in hand.
Purpose: Life is worth protecting