The outbreak of the US-Japan war, 14-year-old Seita took his young sister everywhere to escape. When they reached the air-raid shelter, their mother was already seriously injured and passed away soon after. The two siblings were left to depend on each other for survival. They had no choice but to rely on their mother's sister. Even though they gave all their belongings to their aunt, once the food ran out, they increasingly felt like unwelcome guests. Seita decided to leave with his sister to live independently. Life amidst fire and smoke was not easy. Seita stole food from everywhere to feed his sister, but she still suffered from severe malnutrition...