Nikki keeps a diary in which she documents her daily life, including her interactions with classmates, her crush on the popular boy Brandon, her epic battle with her mom for an IPhone, and her struggles with her arch-nemesis Mackenzie Hollister. The diary entries are accompanied by colorful illustrations, doodles, and handwritten notes, giving readers a glimpse into Nikki's world and personality.
Nikki faces various obstacles and learns important lessons about friendship, self-confidence, and staying true to herself.