A Jaws in the Vacant Lot

Suneo and his dad enjoyed a day of deep-sea fishing. Hearing everyone boast about the dreamlike scenery they witnessed, including an encounter with a school of dolphins, Doraemon, anticipating Nobita's envy, decides to throw the "Koi Fish Gate" into the ocean and set up the "Kita Fish Gate" in a vacant lot.

As expected, Nobita expresses his desire to go deep-sea fishing, and Doraemon tells him he's already prepared. Apparently, fish that pass through the Koi Fish Gate in the ocean will emerge from the Kita Fish Gate in the vacant lot. What's more, by using an underground fishing rod, which can reel in anything found underground, it's possible to enjoy deep-sea fishing right from the vacant lot.

Nobita is overjoyed after catching a big fish, but then a great white shark, also known as the "man-eating shark," sneaks in, causing trouble! The two of them quickly run to the top of the drainage pipe, but.!?