"Follow the magical story of Mahina and Tahi who are unexpectedly chosen by their village elders one day for a special mission. Their journey takes them across the Pacific Ocean in search of a secret passage, then all the way down to the ocean floor... Along the way they meet fascinating ocean creatures, untangle some mysteries of the deep, and discover why a huge and terrifying machine lies abondoned on the seabed. This is a story about two cousins learning to work together despite their differences, and the special connection Pacific Islanders have with the ocean."