The end of the world is coming, cracks tear apart reality, and billions of lives turn into dust. Lin Yuan died in troubled times, and when he opened his eyes again, he returned to the 72 hours before the disaster broke out. In his last life, he was an abandoned son who was left to be slaughtered. In this life, he vowed to rebuild order and protect the last fire of mankind. Establishing a stronghold from scratch, conquering the mutants, and uncovering the truth behind the cracks, he ignited a light of hope in the wasteland. Rebirth is not a gift, but the starting point of revenge and reinvention!