What's the story of returning to Mars?

Return to Mars is a sci-fi film produced by STX Entertainment, directed by Peter Chelsom and co-starred by Asa Butterfield, Britt Robertson and Gary Oldman. The film tells the story of a 16-year-old boy who was born and raised on Mars and returned to Earth with a female netizen to find his biological father.

Gardner is a boy who was born on Mars and grew to 16 years old. His mother's name is Sarah and she is an astronaut. A long time ago, a rich man who loved space opened an immigration base on Mars. Gardner's mother gave birth to him on Mars, and because of this, his mother died and he grew up on Mars. Gardner has been on Mars. He tried to get in touch with people on earth and stumbled upon Tulsa on earth. At this time, the astronaut who took care of him suggested taking him to the earth. With the consent of the leader, he came to the earth and began a wonderful journey to find his biological father.