High school student Mitsuha dreams of leaving her small, mountain-enclosed town to experience the vibrant life of Tokyo. But she is haunted by a recurring dream where she wakes up as a high school boy living in the heart of Tokyo. It feels too real to be just a dream.
Meanwhile, Taki, a high school boy in Tokyo, is facing the same mystery. He keeps dreaming that he is a girl living in a remote, mountain-enclosed town he has never visited.
As this mysterious dream begins to disrupt their daily lives, the events become increasingly complex. The inexplicable dream starts to exert a powerful influence on the lives of these two strangers.
What secret lies behind this strange dream? Does it hold a prophecy or a hidden meaning? Is fate playing a game, binding their destinies together with a single thread?