Nobita wants to go to fishing because Gian and Suneo caught a lot of fish at the nearby river. Nobita asks his mom if he could go to fishing, but his mom says he is clumsy and can easily fall into the river. So Doraemon uses the gadget, Mobile Fishing Lake. But there is so much trouble using the gadget that they fail to catch any fish. The episode ends with Doraemon and Nobita landing in Shizuka’s bath tub mistaking it for a hot spring.