About a month after The Shadow, Zach and his family go on a trip to San Diego during Spring Break. Before--and during-- their journey, Zach must defend against an all-new Dark Realm threat to him, his family, and their vacation. How will Zach stop the city of San Diego from being destroyed? How will he stop his family vacation from being ruined by the constant attacks? Will he manage to stop the Dark Realm before they invade Earth again? Find out in The San Diego.