Faced with a series of tragedies caused by the inhuman “SekiJyou”, a detective puts her life on the line! Detective Shiromine lost her mother in a string of mysterious murders where “Rope-Shaped Red Crystals” were always left at the scene. While searching for the murderer, she meets Saibara, who is in charge of the case, and her daily life changes drastically. Just what’s the truth entangled in those red ropes—?