When Alex doesn't return from a family game of hide-and-seek, secrets are revealed about the Vanderhouvens' past, present, and future.

The Vanderhouvens leave home to search for answers about a cursed artifact from the Congo. But upon arrival, they face unexpected mayhem.

The Vanderhouvens travel to a stormy Scottish island and cross paths with a puzzling local. Larry and Stanley put their mapmaking skills to the test.

A major challenge pushes the Vanderhouvens to their limits. Can they overcome the impossible and finally bring Alex back?