Enchanted by tales of an incredible luminous seaweed, Fox embarks on an expedition to the depths of the deep blue sea. With the help of his cousin Wolf, the equipment needed for his daring dive are mapped and planned, a task which shines a light on the importance of friendship to solve problems and challenges. With flippers on, an oxygen cylinder filled, and an underwater camera in-hand, Fox takes the plunge. His mission to find the mysterious submerged plant takes many twists and turns, encountering giant algae, a city of coral, and a whale trapped in a fishing net, with a final discovery that promotes the message: Together we are stronger.