During Koyomi Araragi's second year at Naoetsu Private High School, he crosses paths with Tsubasa Hanekawa, the top honor student who reveals a shocking rumor about a cold-eyed, stunning vampire lurking in their town. Though hesitant to believe the tale, Araragi's self-made investigation leads him to discover bloodstains and follow the trail deep into the subway station, where he's met with a petrifying sight - the dismembered body of the rumored vampire. As she cries out for help, Araragi must make a life-altering choice that will change him forever.