Tokyo has collapsed into a post-apocalyptic state, devastated by war. On the outskirts of the capital, two girls have made their home in an abandoned military tank situated at a dry riverbed in Suginami Ward. Mandara Legrand, who speaks like a broken tape recorder, lives alongside Becchin, a paranoid girl who suffers from hallucinations of her life before the war stripped away her world. Left to fend for themselves, there is no one remaining in the war-torn town who can assist them in surviving the aftermath of the destruction. Alone, they battle the undead, hunger, and boredom using the meager supplies scavenged from the capital's wreckage. The two girls struggle not only against their environment but also with their own sanity, as they cooperate to stay alive in the deteriorating pastoral countryside.