The Ship of Theseus

On June 24, 1989, a horrific tragedy struck the quiet village of Otousu in Hokkaido when twenty-one people, including several children, were discovered poisoned to death inside the local elementary school. Bungo Sano, a police officer serving the very same community, was arrested and charged with the mass murder. Despite being sentenced to death, Sano has steadfastly maintained his innocence for decades, leaving a dark shadow over his family's life. Twenty-eight years later, his son, Shin Tamura, begins to question the official narrative that destroyed his family. Driven by growing doubts about whether his father was wrongfully convicted, Shin decides to take matters into his own hands and launches a personal investigation into the long-closed case. His search for answers leads him back to the original crime scene in Otousu, but upon his arrival, an unnaturally thick fog rolls in and completely engulfs him. When the mist finally clears, Shin makes an impossible discovery: he has been transported back in time to the year 1989, just before the massacre occurred. Now thrust into the past, he must navigate a dangerous mystery and confront the truth firsthand. This gripping crime suspense transcends the boundaries of time and space as a desperate son fights to uncover what really happened in his hometown.