The crew of the Aries is still on Mars and Jarivs and Leroy (the Frenchman of the crew) set out on a new expedition to salvage the films Jarvis had left in the wrecked rocket. Jarvis has the extra plan to find his alien friend Tweel, the intelligent ostrich, a plan which I very much appreciated. Well, Tweel is found and the crew members find out something about Tweel's race and the Human race that rattles their view on the world...