The arrival of the summer carnival, with its promise of excitement and escape, ignites a simmering rivalry between two sisters. Tessa and Lulu, left to their own devices for the summer, find their bond tested by burgeoning independence, romantic interests, and a growing jealousy that threatens to unravel their relationship. The narrative unfolds through alternating chapters of prose and comics, creating a unique visual and textual experience that explores the complexities of sisterhood and the inevitable pains of growing up.

The novel is recognized for its dual format, blending prose and comics to explore the intense emotional landscape of adolescence. The narrative structure is noted for its ability to capture the distinct voices and perspectives of the two sisters as their relationship shifts. The story's focus on the painful transition from childhood innocence to the complexities of young adulthood, particularly concerning jealousy and first loves, is a central element. The interwoven formats are designed to amplify the emotional resonance of the sisters' experiences, leading to a poignant and impactful conclusion.