SPIRAL....a mystery anime about a boy named Ayumu Narumi and his 'partner in crime' Hiyono Yuizaki. Together they try to solve the riddle of the Blade Children along with Police Chief and Narumi's sister-in-law Madoka. As they get closer to solving the mystery, they may even get closer to finding Detective Kiyotaka Narumi, Ayumu's older brother and Madoka's husband, who disappeared two years earlier trying to solve the same riddle. Ayumu Narumi struggles to solve each case while learning to believe in himself. His destiny is on the spiral...