In a world where dolphins possess extraordinary intelligence and communicate through a complex language of sounds and telepathy, players assume the role of a young dolphin named Echo. After discovering a sinister plot by an underwater corporation aiming to exploit dolphin communication for profit, Echo must rally dolphins and other sea creatures to launch a counteroffensive. Players navigate through vibrant underwater environments, solving puzzles that unlock new abilities and forging alliances with diverse marine life. Choices made will affect alliances, environments, and the outcome of the Wavelength War, leading to multiple endings.