After learning they've inherited property from reclusive grandparents he hardly knew, Steve and Sarah Miller decide to take a few days off to investigate their newfound fortune in the quiet Idaho resort town of Coeur d'Alene. The inheritance turns out to be beyond their wildest dreams, a vast mansion with lovely gardens. While exploring, they discover a unique set of carved doors on the top floor of their new home. Disguised as a simple door, a portal is accidentally activated and Steve and Sarah find themselves staring at the amazing sight of a lush forest beyond. It's a tantalizing decision: to check it out or to run. Curiosity getting the better of them, they step through, the portal disappears, and they are on a one-way journey to a land where people have strange powers and where mythical creatures abound.
Too late, they discover that they are confronted by dragons, griffins, and bugs of nightmarish proportions. To get home they decide to enlist the aid of the local king and queen. Oddly, they are expected at the castle, and it is revealed their arrival had long been foretold by an ancient prophecy which bestows upon them the status of Royal Bodyguards to the young crown prince.
Now, they are stuck on a foreign world where danger lurks everywhere, and the newly appointed bodyguards must find a way to return home and to keep the young prince safe.