After playing with Gabu, May returns home and discovers that Mii has gone missing. May wants to search for her, but is stopped by the grown-up goats, who tell her that it'll be too dark and dangerous before long.
May, Mii, Tap and Moro decide to travel to Parapara Plain to see a black baby goat. To get there, they must travel through the dangerous Magamaga Forest. Tap takes the lead, but only manages to get them more and more lost.
A flock of swallows arrives at Sawasawa Mountain, where May lives. The swallows enjoy putting what they see and hear into their songs. Two young swallows, Pippi and Chicchi, see Gabu and May getting along with each other.
Gabu and May eat silverberries on a hill. Without thinking, Gabu blurts out that he'd prefer meat over berries any day. He tries to backpedal, claiming he doesn't like goat meat, but May can't believe him.
Gabu and May continue to meet, keeping their friendship a secret to their respective kin. Mii, whom May treats as her younger sister, develops a high fever. The medicinal herbs that can lower the fever are located in a high, dangerous place.
One stormy night, a wolf named Gabu and a goat named May take shelter in a small shack. Unable to see each other in the dark, the two hit it off and after the storm subsides, agree to meet in front of the shack before returning to their respective homes.
In the pouring rain, Gabu and May plunge into a raging river. Gabu wakes up at night, under a starry sky. Despite the pain, he runs along the river in search of May. Meanwhile, an otter named Tao looks on curiously.
Giro and the others learn that Gabu is friendly with the goats. Gabu is thrown into a cave in Bakubaku Valley, as May is troubled by nightmares in her cell on Sawasawa Mountain. In her dreams, May sees her mother and a younger Giro.
Rosso the goat spots Gabu and May playing together. Confronted by the grown-up goats, May finally admits that he and Gabu are friends. The goats think she's been tricked by the wolves, and she is thrown into a cell.
May comes across Bibi, a young deer from Pukapuka Mountain who's separated from the herd. Seeking to help Bibi, May asks Gabu about the mountain, but all Gabu can think about is how delicious the young deer sounds to him.