16-year-old Suzume lives in a quiet town on the island of Kyushu. One day, on her way to school, she meets a young traveler who asks where the ruins are in the neighborhood. Curiosity takes over, and the girl decides to see what's so interesting there - she sneaks into a local abandoned place, finds a mysterious door, opens it and pulls a strange stone out of the ground. Soon, a giant entity emerges from the open door and triggers an earthquake. Now Suzume, along with the same stranger suddenly turned into a child's chair, has to go in pursuit of the harmful talking kitty to close the doors that are opening all over the country and prevent more destruction.