High school junior Suzume has no idea why the beautiful stranger she meets is looking for ruins, for a certain door. Soon after pointing the stranger, Souta, in the direction of an abandoned resort, she thinks better of it and goes to try and stop him. But before she can find Souta, Suzume unknowingly opens a decrepit door to a world beyond time and place—and stumbles into an adventure of seismic proportions.

 

居住在九州港鎮的高中生──鈴芽，
某天遇到了一名「正在尋找門」的青年──草太。

鈴芽追著草太來到廢墟裡的一扇門前。
她像是受到指引一般打開了那扇門，而出現在門後的…
竟是超越了時間與空間的景色