Best friends and neighbors Anthony and Julian are having the summer of their lives. Making pancakes, riding bikes to the beach, playing in the sand and surf...They have everything they need for an epic summer vacation. But Anthony is worried. He has a secret--a secret about Julian's missing marble. And he knows that once Julian finds out about it, he'll be mad. He may not even want to be Anthony's best friend anymore. So Anthony is determined to have the best last day as Julian's best friend...until he can't hold in his secret any longer. But maybe Julian has a surprise of his own to share with Anthony...