Welcome to Serenity, the town where everyone looks on the bright side—on purpose. To belong in this picture-perfect community, residents must agree to reject negativity by embracing optimism as a way of life. For twelve-year-old Mackenzie Werner, whose feelings manifest as a colorful haze around her body, Serenity promises an escape from bad feelings, mean comments, and the distress of her haze turning into a grumbly grapefruit smog.

However, when a documentary filmmaker comes to town and starts asking questions, Mackenzie is overwhelmed by emotion and can’t hold her haze back—and it explodes onto the town. Now everyone in Serenity has their own haze, revealing their repressed feelings. As Mackenzie discovers the complexity of her emotions, she and her entire community must learn to reckon with the shocking true colors that now paint the town of Serenity.