Siren the Ghost Story Again: Disappearances... What if a magical fairy beyond human knowledge is lurking in the shadows of incidents that could occur in our daily lives? Mysterious disappearances and slaughters in a seemingly peaceful and ordinary port town are so bizarre that all the bodies found have been mummified. Detective Junpei investigates this mysterious case. His father, who was also a detective, disappeared 20 years ago while investigating another strange case.