British-born Hugo is determined to take his last-hurrah-before-college train trip across the United States. One snag: the companion ticket is already booked under the name of his ex, Margaret Campbell. Nontransferable, no exceptions. Enter the new Margaret C. (Mae for short), an aspiring filmmaker with big dreams, looking for an opportunity to expand her horizons. As Mae pushes Hugo to explore his dreams for his future, he encourages her to channel a new, vulnerable side of her art. But when life intervenes, will they manage to keep their new love on track?