Fresh out of the police academy, Shindou Ranmaru is thrust into the high-stakes world of Tokko: Special Mobile Investigation Force. On the day of his graduation, he comes face to face with Rokujo Sakura, the enigmatic girl who has haunted his dreams. Unveiling her affiliation with a covert faction within Tokki called Tokko: Special Public Safety Task Force, Shindou embarks on a quest for justice, driven by the desire to avenge his parents' tragic fate and unravel the chilling enigma behind the Machida Massacre in his hometown. As Japan is plagued by the sudden appearance of ominous chasms and the emergence of otherworldly beings, the puzzle deepens: could these ominous occurrences hold the key to the horrors of the past?