Eighth-grader Leta "Lightning" Laurel is a big sister, a problem solver, and the star of her track team. Her dad's been out of the picture for more than a year, and food's gotten scarce at home.

When Leta learns her mom's financial struggles are even worse than she'd thought, she hatches a plan to bring her dad home: she'll win district champion in the 400-meter dash, the newspaper will write about her, her mom will send the clipping to her dad, and her dad will remember he has daughters who need him. Because she'll be unforgettable.

It should be easy; no one can beat her in the 400. But a new runner shows up, threatening Leta's top spot and her budding feminist beliefs about sisterhood. She works harder and harder in practice, trying to ensure the new girl won't ruin her perfect plan...until an injury sidelines her.

How will she ever prove to her dad and the world that she's unforgettable? How will she prove it to herself?