Initially, the group wonders why Doraemon is so desperate to retrieve a standard, cheap bell instead of just buying a replacement. Through a series of poignant flashbacks, the film reveals the sentimental value of the item. It was the very bell Nobita went to extreme, exhausting lengths to find for Doraemon when they first became friends.
The story begins unexpectedly when a mysterious thief named Deluxe sneaks into Nobita’s house. He steals Doraemon’s signature yellow cat bell, leaving behind a calling card. Without his bell, Doraemon begins to exhibit strange, feral cat behaviors. doraemon movie nobitas secret gadget museum