Vincent, a young humpback whale, is the orphaned son of the last whale singer, whose magical song once protected the oceans. When a monstrous leviathan breaks out of a melting iceberg and threatens all life in the seas with its poisonous ink, Vincent must find his own song to stop the danger. Accompanied by Walter, his pedantic shipkeeper-nanny, and Darya, a brave deaf orca warrior, Vincent must overcome his fears.