On Saturn's largest moon, ancient stone statues hold the key to survival.

When the MacIver siblings—ten adopted children with mysterious connections to different worlds—answer a desperate call from Titan, they discover their sister Antonia is the last Keeper of the Moai. These towering monuments, similar to those on Easter Island, contain technology that could save this dying alien world. But first, the MacIvers must learn to harness the harmonic frequencies hidden within the stones.

As methane lakes drain and sacred creatures perish, they join forces with the indigenous Rapa Nui people to restore balance to their ecosystem. Standing in their way is the Loma, a powerful being who has manipulated events for generations. With time running out, the MacIvers must activate all eighteen Moai in a precise sequence that will either save Titan or destroy it completely.

In this breathtaking blend of science fiction and environmental allegory, saving a world requires more than just advanced technology—it demands understanding the delicate harmony between progress and preservation, and the unbreakable strength of family bonds.