Finley can’t wait for the class field trip to the art museum. She’s always painting and gluing and snazzifying and glitterizing. In fact, she might even want to be a real artist when she grows up. When Mr. Spark assigns a project based on the question: “What is art?” Finley figures it'll be a snap. But the more art she sees, the more mixed-up she gets, especially since bossy Olivia Snotham won't keep her opinions to herself. Finley starts to worry she’ll never figure out the answer. As Finley and Henry make some art-rageous portraits of each other, they discover the power of art, and Finley makes her mark in a Fin-tastic way.