After top assassin Mo Fei leads his assassin squad and is wiped out by an emperor-grade mutant in the doomsday, he unexpectedly is reborn back before the doomsday outbreak. He gathers his 11 former life-and-death assassin teammates and the husky Bruce, relying on the spatial superpower that can hold living creatures and comes with spirit spring and black soil. He frantically takes orders to raise billions of funds, hoards ten billion cold-proof, weapon, and living supplies, builds a steel fortress, and all members awaken multiple superpowers. Facing the early outbreak of catastrophe and mutation craze, the Shadow Squad crushes all enemies along the way and clears the doomsday!