The Bittering Family landed on Mars because of the war on Earth. Harry is paranoid because he thinks they don't belong there.
They settled down in their cottage and Harry only ate the food from the deep freeze. Then, he started noticing differences in his children.
As Harry was yelling for his kids they weren't acknowledging so he talked to them. Turns out they were changing their names into foreign ones like Martian Names
As the days were coming and going Harry noticed his family was using a weird language and their eyes started to get goldish yellowish. And all the food from the deep freeze had run out.
Then they all wanted to move to the Martians villas and leave all their stuff in their cottage because the villas had pools and they were more comfortable.
After the war on Earth, the lieutenant came to Mars to pick up any of the people in the cottages, but he doesn't find any because they all left. But he saw 800 Martians in the villas. That's because all the people on Mars changed into Martians because of the environment and food so they all moved to the villas.