While taking a break on their journey, Ash decides to help Oshawott overcome its fear of opening his eyes underwater. While they are doing that, Iris and Cilan are watching all the other Pokémon. Scraggy wanders off and angers some wild Foongus, causing them to attack and badly poison the other Pokémon. The only thing nearby that can heal them are herbs found at the bottom of the lake. Oshawott is the only one who can get them, but his fear makes it a difficult task. To make matters worse, a group of Tympole, a Palpitoad, and a Stunfisk attack anyone who goes into the lake.