What if your soul is so intertwined with someone else's that it's impossible to imagine yourself without them? Blake McIntyre and Liane Kelly’s families have spent their vacations together on Sanibel Island their entire lives, and the two have always been the best of friends. But as they get ready to go to college, they admit that friendship isn’t enough for them anymore and spend a whirlwind two weeks daring to dream of their future together. But building sandcastles and lazy beach walks filled with moonlight kisses isn't the same as real life, and soon they are faced with a new reality. Can their hope of forever survive past their summer, or does fate have its own twisted plan?