There are hundreds of thousands of companies in modern Tokyo, but only one Phantom Quest Corporation, a firm that specializes in exorcisms and troublesome spirits. Its founder and CEO is Ayaka Kisaragi, a red-haired klutz whose lipstick turns into an enchanted sword when she needs to dispatch vampires, demons, or ghosts. Party-girl Ayaka drinks too much, oversleeps, and murders songs in karaoke settings, turned her late-night lifestyle into a business that gives new meaning to the term 'graveyard shift'! She's assisted by the exorcist Rokkon, the medium Madame Suimei, the innocent-looking Nanami, and Mamoru, a long-suffering computer whiz who tries to reconcile Ayaka's prolific spending with her limited income.