Mitsuha is a high school girl living in the town of Itomori located in Hida region. She works as a maiden at the family temple. She begins having dreams, where she is a boy living in Tokyo. She learns that she wrote "Who are you?" on a notebook. Taki is a high school boy living in Tokyo. He is also having dreams where he is Mitsuha. He learns that they can switch bodies when they wake up. They begin communicating with each other. Taki leaves notes in Mitsuha's notebook and Mitsuha leaves memos in Taki's phone. They change each other's lives during this time.