As Mei tricks her friend Mii in order to continue to hang out with Gabu, she feels guilty upon returning home and finding Mii had caught a fever. Mei learns of a plant that grows on top of a mountain in BakuBaku Valley that could help Mii. Gabu offers to go find it for her, despite the fact he is bad at climbing. Recalling a tune both he and Mei knew from childhood, Gabu gains the courage to recover the plant so that May can cure Mii.