After meeting one bright, sunny day, a shy boy who expresses himself through haiku and a bubbly but self-conscious girl share a brief, magical summer.

Pikachu and his friends have gathered to listen to a song performed by Meloetta at the melody tree. Meloetta is soon interrupted by a Sandstorm attack which breaks the tree and causes the Melody Berries to scatter. Before the performance can continue the Pokémon must retrieve the lost berries.