Doppelgangers from other dimension are replacing people on Earth and it is up to a group of Onmyoji to protect us from the evil spirits.

One day while working as a photograph assistant in a beach, Chiku finds an ancient sword who talks to her and tells her she is the chosen one to defeat evil spirits. Enthusiastically, she accepts the mission and rescues several girls who have been left bound and gagged, but the girl doesn't suspect she has been deceived, and that she is actually rescuing the evil spirits called Tomokaduki, who can become doppelgangers of people they intend to replace to escape their dimension. Once she realizes her errors, Chiku must join forces with Sasayo and Saori, two Onmyouji girls dedicated to fighting evil spirits in a last desperate attempt to stop the invasion.—Pencho15