While on a journey to get some rare phosphorus, Aquaman, Aqualad and Tusky arrive at the Valley of Glowing Rocks, get their phosphorus and head home. On the way Tusky ends up getting lost. A submarine full of mutants known as Bulks, who work for the sinister Sea Scamp, see and harass Tusky. Aquaman and Aqualad show up to save him from a kelp monster that is holding him. The Sea Scamp then animates the hunk of phosphorus into a monster to get them, but will he be victorious?
