ADHD-stricken Tilly Twomley has successfully suffered through high school burn out to be given the opportunity of a summer internship with her sister's photography start-up touring Europe. Oliver Clark's autism has made it tough for him to make close friends, but with his love for color theory and design, the promise of placing in a prestigious design program next fall, and a summer résumé-building internship, his future looks bright. Tilly's ADHD and Oliver's autism clash in the worst way on the plane trip over, but as their summer internships go on, Oliver begins to feel things for Tilly he never expected.