Thanks to Mako's magical ability, the detective agency faces off against the mastermind behind the artificial Shikigami masters, who have instilled fear and terror throughout the city. His name: Kanamaki! His research project Helix, a screw monster with the power to regenerate itself in the blink of an eye, proves to be an extremely powerful opponent. How are Kyosuke and the others supposed to take on someone like him?.