Seventeen-year-old Suzume Iwato lives in a quiet town in Kyushu. One day, she meets a mysterious young man searching for doors. Following him, she discovers a dilapidated building with a solitary door standing amidst the ruins. Drawn by an unseen force, Suzume opens the door, unleashing a series of disasters across Japan. To prevent further calamities, she embarks on a journey to close these doors, encountering supernatural challenges and forging deep connections along the way.