In a world where the supernatural is real and dangerous, the Armed Detective Agency employs individuals with extraordinary abilities to solve cases too bizarre for the police. The story centers on Atsushi Nakajima, a young man cast out from his orphanage who, after a chance encounter with the eccentric detective Osamu Dazai, discovers he possesses a power of his own: the ability to transform into a majestic white tiger. Joining the agency, Atsushi finds himself among a cast of literary-named geniuses, including the fierce Doppo Kunikida and the enigmatic Ryunosuke Akutagawa, his ruthless rival from the shadowy Port Mafia. As the agency tackles threats ranging from rogue ability users to a sinister criminal organization, Atsushi must learn to master his newfound strength and confront his traumatic past. Blending stylish action with sharp wit, this supernatural thriller explores themes of purpose and belonging, where every case brings the team closer to a looming, city-shaking conflict.