In the mythical Elven world of Altera, an epic battle unfolds between the beautiful Princess Liya and the Dark Elf Elena, who has gained possession of a jewel so powerful it allows its holder complete authority over all Alterans.
High schoolers Mitsuha and Taki are complete strangers living separate lives. But one night, they suddenly switch places. Mitsuha wakes up in Taki’s body, and he in hers. This bizarre occurrence continues to happen randomly, and the two must adjust their lives around each other.