Edmond Hamilton wrote this under the house name, Brett Sterling. A fast paced story about a movie being made about Captain Future and his crew. But it is a front from a greedy man who wants to plunder Pluto's moon, Styx, which is full of diamonds. Plenty of excitement as Otho is killed (?) and Joan is alone and deep underwater with a sabotaged oxygen tank with no oxygen in it. The crew are trapped on a moon with all metal on it destroyed including space ships and guns, so no escape, with hundreds of violent men attacking them and wanting them dead. Space opera at its best.