Tilly Twomley white-knuckled her way through high school with flawed executive functioning which has left her burnt out and ready to start fresh. Working as an intern for her perfect older sister's start up requires her to travel around Europe, offering a much-needed change of scenery as she plans for her future. Oliver Clark's autism often makes it hard for him to form relationships, but his love of color theory and design allows him to feel deeply connected to the world around him. He's earned placement into a prestigious design program, and a summer internship to build his resume. But now he's being forced to spend the summer with a girl that couldn't be more his opposite -- and feeling things for her he can't quite name. As their neurodiverse connection grows, they learn that some of the best parts of life can't be planned.