In the series "Onmyo Kaiten Re:Birth Verse," rebellious teenager Takeru Narihira has recurring nightmares where he is chased by monstrous creatures, always rescued by a mysterious girl. After vowing to save her during their 1,999th dream encounter, Takeru gets into a motorcycle accident and is transported to Denji Heian-kyo, a futuristic, alternate version of Japan's historical capital, where the girl from his dreams, Tsukiyima, lives, though she does not recognize him.
A sinister black fog engulfs the city, petrifying residents and releasing demonic oni. Only the onmyouji, sorcerers equipped with magical shikigami suits, can battle these creatures. When the fog returns, Takeru discovers his own unique transformation abilities and resistance to the oni. Tragically, both Takeru and Tsukiyima are eventually killed, but Takeru awakens in Denji Heian-kyo again, this time two weeks before the fog's emergence. Determined to protect Tsukiyima, Takeru decides to train as an onmyouji to change the course of events.