Three friends go to the park, where it seems like nothing is happening—but something is.

The wind is stirring the trees and sending maple keys spiralling down through the air, inspiring the children to whirl and spin...which makes a baby laugh and clap, and a man tap a rhythm with his cane. Soon, the kids and those around them are part of a domino effect of creativity from painting and building castle forts to having daring adventures and sailing the imaginary seas, and finally staging a colorful parade and watching stories unfurl in the clouds.

The kids follow this path of creativity, until finally it's nighttime and they think nothing more could possibly happen. But something does: their minds continue to create fantastical possibilities in their dreams.