The Graythornes had everything life could possibly offer: wealth, a beautiful home, friends and family. So why then did it still feel like something was missing?

Gloom seeps through the household like a noxious gas, infecting its inhabitants. Patriarch Derek Graythorne believes that the family's upcoming summer vacation may be able to reignite the flames of excitement that they had lost over the years, but is still somewhat skeptical. That is, until one night when he meets a mysterious stranger on a midnight stroll contemplating his situation.

This newcomer, odd and slippery as he is, offers Derek a grand opportunity of the very thing he has been missing. But it comes with a hidden cost. Unaware of this, Derek leads his family on a trip none of them could have imagined, and will certainly never forget.

Danger and excitement lurk around every corner, whether friend or foe yet to be decided. Follow the Graythornes on their journey across the world, and possibly beyond.