While searching for clues about his father, and the home planet he's never known, Gardner begins an online friendship with a street smart girl named Tulsa. When he finally gets a chance to go to Earth, Gardner is eager to experience all of the wonders he could only read about on Mars. But after his explorations begin, scientists discover that Gardner's organs can't withstand Earth's atmosphere. Gardner joins with Tulsa on a race against time to unravel the mysteries of how he came to be, and where he belongs in the universe.