Yuri Suzuki is a typical 15-year-old Japanese girl until she is suddenly pulled through a puddle and transported 3,500 years into the past to Hattusa, the capital of the Hittite Empire. She quickly learns she was summoned by the treacherous Queen Nakia, who intends to use Yuri's blood as a human sacrifice to curse the other princes and ensure her own son inherits the throne. Saved by the charismatic Prince Kail, Yuri is forced to pose as his concubine to stay under his protection. However, as she demonstrates 20th-century knowledge and iron-willed courage, the people begin to worship her as the incarnation of the war goddess, Ishtar. Yuri must now navigate a world of ancient warfare, political assassination, and heart-wrenching romance as she decides whether to return home or remain by Kail's side.