Thirty-year-old Yoshizumi Sohata (Toruko Miura) has never had any feelings for anyone and does not know what love is. After failing in her aspired career in music, she returns home to work at a call center, where she is busy with her daily duties. With her younger sister married and pregnant, and her mother pressuring her to get a girlfriend, her mother sets up a blind date without her permission. Reluctantly, she heads to the blind date, but there she meets a man who wants to establish a relationship with her as a friend rather than marriage.
Japan, 1944. Trained for intelligence work, Hiroo Onoda, 22 years old, discovers a philosophy contrary to the official line: no suicide; stay alive whatever happens; the mission is more important than anything else. Sent to Lubang, a small island in the Philippines where the Americans are about to land, this role will be to wage a guerrilla war until the return of the Japanese troops. The Empire will surrender soon after; Onoda, 10,000 days later.