Brilliant but inexperienced Iris is humiliated when her crush dismisses her as too naive for romance. Determined to stop feeling inadequate, she turns to Nash, the charming rule breaker with a reputation for never taking love seriously. Their arrangement is supposed to be simple: he gives her lessons in attraction, and she keeps her heart out of it. But teasing conversations and increasingly charged encounters make their boundaries harder to protect. When the boy who once rejected Iris suddenly wants another chance, Nash must face the feelings he never planned to have.