The movie begins in a museum. There are guards everywhere along with a museum director because there is a thieve named Kaitou DX who threatens to take a precious item inside the museum. When the crafty thieve, who disguised himself as the museum director, tries to take the statue he is going after, a detective who looks like Nobita appears. As it turns out, this is all Nobita's dream inside his classroom.

Back in Nobita's home, Doraemon is asleep. All of a sudden, a mysterious protal appears and a card with the letters "DX" falls on the ground. Immediately after, Nobita returns home and threw his backpack on top of the card, and his test with "0%" falls out from his backpack. He quickly hides the tests paper and put it together with the card into his pocket as his mother came. Soon, the thieve arrives through a portal and steals his cat-bell. Without his cat-bell, Doraemon started to act more and more like a normal cat. In order to stop this, Nobita, Shizuka, Suneo, and Gian decided to go and search for his bell. They went to a factory where all the Doraemon gadgets were made. They were fascinated by all the tools and most of all, they saw the very first "Anywhere Door" ever made!

Dalam kisah kali ini yaitu:
Ketika Doraemon sedang tidur, ada seorang pencuri terkenal yang datang untuk mencuri bel yang ada di kalungnya Doraemon. Tanpa adanya bel di kalungnya, maka Doraemon akan bertindak selayaknya seekor kucing yang normal. Untuk menghentikan ini, maka Nobita, Shizuka, Suneo, dan Giant harus pergi untuk mencari bel milik doraemon yang telah di curi. Lalu akhirnya mereka pergi ke suatu tempat yaitu sebuah pabrik dimana semua alat-alat Doraemon dibuat.
*maaf cuma dapet segitu yaa gan