During a sunny morning on the school playground, Lily, Max, Sophie, and Ben find a lost blue lunchbox near the swings. After searching for its owner, they notice a shy boy sitting alone. When they return the lunchbox to him, they discover it contains a note wishing him a good first day-it's his first day at the new school. The friends invite him to join them for lunch and games under the oak tree, helping him feel welcome and less shy. By the end of the day, a new friendship has formed, and the boy feels happy and included.