Continuing the journey to Veilstone City, Ash is busy training Turtwig, so it can perfect Energy Ball. Realizing that it is getting late, Brock insists that they get to the next town before it gets dark. Dawn says that instead they should go to a nearby hot springs hotel owned by her friend's family.
They arrive there and Dawn introduces them to her childhood friend Leona. While they immediately jump into the hot springs, they find out that the water level is low and they are cold. Leona reveals that it happened just recently and her parents went off to find out the reason. Ash, Dawn and Brock agree to help her find the reason and head up into the mountains with her. They soon discover a fresh hot spring in the mountains. The hot spring was made by a disguised Team Rocket, who is tapping into Leona's pipeline, and now they must find a way to get the water back.
An episode featuring three Swinub and hot springs also appeared during the Johto saga.
Leona greeted Dawn by calling her Dee Dee (Japanese: ピカリ Pikari), the same nickname Kenny uses for Dawn.
Leona uses Dawn's catchphrase often in this episode saying "No need to worry" (Japanese: "Daijōbu!").
Professor Oak's lecture: Luxray
Pokémon senryū: うせものを みつけてにっこり レントラー Usemono o, mitsukete nikkori, Rentorā.
Polka O Dolka, By Your Side ~Hikari's Theme~, and Pokémon Symphonic Medley were used as background music.
This episode's dub title is a before and after. The first half is "hot spring" and the second half is the term "springing a leak."
In this episode, Team Rocket uses a variation of their motto.
When Ash's Turtwig uses Energy Ball in the beginning, its Japanese voice can be heard beneath its English voice.
When Dawn pushes Leona underwater, her navel disappears.
After the Tag Battle finishes, Swinub is frozen, which is impossible, as Ice types are immune to freezing outside of Tri Attack.