AU: Caitlin Snow is the beautiful, studious girl from Starling City who keeps to herself (and her best friend, Felicity Smoak). Barry Allen is the equally quiet aspiring novelist from Central City with a passion for believing in the impossible. When Felicity's birthday celebration brings them together, they are inseparable; determined to make things work between them. However when unforeseen circumstances tear them apart, a trip down memory lane leads to a life altering decision.