That day, everything humankind took for granted collapsed into an unspeakably odious hell. First came a storm of wasps whose stings rotted flesh and dissolved bone. Next came the "Dollies"—terrifying doll-like giants with live "human vacuums" and an array of other ghastly weapons at their disposal. Half a year later, only 1% of the global population remains, and traumatized survivor Iruma Ikaruga reflects on the carnage he witnessed on that tragic day. On the verge of suicide, he inadvertently saves a girl named Yuu Banira from her would-be rapists, and the grateful Banira invites him to join the resistance group Trial and Error. Iruma reluctantly agrees, and he later witnesses Trial and Error's near-impossible feat of capturing a Dolly. However, the operation falls into shambles when a