Racking their brains, Julian and Captain are trying to come up with a new adventure. WHAM! A warm ocean breeze hits them with news of a hidden treasure at Fin Rock. Excited, Julian recruits Stevie, one of his best friends, who has no idea what Julian has planned, and what dangers he might be put in. Before they could even say electroencephalographically, they are cast out and stranded in deep ocean waters. How will they get out of this one?!?