A short adventure in which the PCs must explore a network of submerged lava tubes on the seabed to rescue a locathah prince. It's well written, and the while the scenario itself is, perhaps nothing extraordinary, the underwater setting gives it a fresh and original feel. Indeed, the background to the scenario suggests many more plot hooks for continued aquatic adventuring.

The artwork and map are top notch, and the writing and layout are very good, bringing the unusual setting to life. The scenario also includes a monster template, and a couple of spells that can apply it to existing creatures. (One minor point: aberrations aren't included in the template description, yet they were obviously supposed to be, judging from the example provided).

On the whole, well thought out, and an interesting change of setting.