Like mountain gnomes from legends, a people who call themselves the scarlet caste have been working in the depths for centuries. At the cost of incredible hardships, he extracts helium-3, hoping to accumulate enough of it to one day leave the Martian holes, surround the planet with a shell of air and water, and create conditions for human existence on the surface. And suddenly it turns out that Mars has already been terraformed, this was done by the gold caste in secret from helium miners, and the gold ones consider themselves masters, while the scarlet ones are assigned the role of slaves. To liberate the oppressed people and achieve justice, the Sons of Ares organization sends the young miner Darrow to the top, modifying him to such an extent that in appearance he is indistinguishable from his elite peers. Luck favors the conspirators, a little more and it will be possible to deal a fatal blow to the ruling elite... But one step away from victory, Darrow makes a fatal mistake.