Sea Sparkle follows Lena, a young adolescent and talented sailor whose father died at sea. She is determined to prove that her father wasn’t responsible for the boat accident which caused his death, alongside that of two other fishermen. She is convinced that a mysterious underwater creature, driven out of the abyssal depths by global warming, is haunting the waters of the North Sea. Lena will do everything she can to prove the existence of this beast and the innocence of her father.