在江湖上一直流传着关于艾丽塔（朴璐美 配音）的传说，在传说中，她是最凶狠，最残暴的赏金猎手，任何落入她手中的猎物，只有乖乖等死这一种选择。而在一次营救行动中，艾丽塔遇见了落难的弗兰多国公主珐莉斯（小清水亚美 配音），被怪物追击的两人意外掉下了悬崖，而当她们再次睁开眼时，自己的脸庞映入了两人的眼帘。就这样莫名其妙的交换了身体的两人会担负怎样的命运呢？
受珐莉斯所托，艾丽塔决定帮助她完成复国的愿望。此番回归，臣民们送给了她们性情大变的公主“虐杀姬”的称号，而艾丽塔渐渐的发现，自己似乎被卷入了谋权篡位的邪恶阴谋中。

Kyuuketsuki Miyu is a disturbing four episode long anime series about a young immortal vampire princess named Miyu and her protector/servant/best friend and more Larva. In four episodes, a nosy spirit-hunter Himiko Se chases the elusive Miyu because she is very curious about Miyu's past. Miyu, she discovers, is the guardian of the door between the two world: One of the Shinma ("shin" god; "ma" ghost/demon) and the one of our world. The Shinma wake from their sleep and disturb the lives of the Humans living above. Miyu and her servant (?) Larva hunts down these strange beings. However, Miyu is one of the Shinma herself and dislikes her duty. In the four episodes, Himiko Se discovers her link/destiny with Miyu...