A generational ship arrives to OceanWorld, a planet made almost entirely of water, a blue ocean that is a paradise for marine lifeforms, driven to near extinction at the hands of ancient land walkers thousands of years ago. Full of intelligent cetaceans and other marine communities, the dolphins and whales thrive in their pristine planet, evolving in culture and intelligence. Everything is in balance. Until the generational ship arrives from Earth with settlers who decide to establish their colony in OceanWorld, to exploit the abundant natural resources of the ocean planet. The recent arrivals start having a harmful impact on the environment to the point that the native marine populations start to witness the contamination and damage of their natural equilibrium, and a conflict erupts between the land walkers and the native marine life.