Blythe has spent years collecting and cataloguing lost buttons because they connect her to her past. While searching for them, she meets August, who joins her on her unusual quest. As they travel around the town finding buttons, Blythe gradually becomes less obsessed with collecting and more open to enjoying the moments they share. When she finds a red button that reminds her of her grandmother, she chooses to leave it behind. Blythe realises that the journey has given her something more valuable than the buttons: a friendship with August.