Tatsuo Senou, father to Junpei and Kanta, raises his sons alone following their mother's death. His responsibilities encompass not only his immediate family but also the defense and welfare of the entire island community. Under the Soviet occupation of Shikotan, Japanese residents endure harsh restrictions, including drastically reduced food rations. Within this oppressive environment, Tatsuo takes significant personal risks to secure and distribute essential food supplies to the island's inhabitants. These actions carry the constant threat of arrest by the occupying forces if discovered. Tatsuo shoulders these dual burdens, prioritizing the well-being of others above his own safety, demonstrating profound duty and sacrifice. He maintains a stoic demeanor while navigating the relentless challenges of providing for his children and the broader community.