As the series opens, the kingdoms of O'ahu, Maui, Kaua'i, and Hawai'i are trapped in a non-stop cycle of war. A prophecy foretells that one day a great king will unite the kingdoms and end these wars. However, that prophecy has only made kings believe that they'll be the ones to unite the kingdom, further exacerbating conflict.

The 'Game of Thrones' alum co-created and stars in the sweeping, action-packed drama about the unification of Hawaii in the 18th and 19th centuries.