SpaceX founder and CEO, Elon Musk, may be the third-richest person in the world, but to the residents of Boca Chica he's simply a ruthless businessman. This sleepy hamlet on the southernmost tip of Texas is home to retirees who were looking forward to enjoying their golden years in this beach paradise. Then SpaceX came to town. Founded in 2002 to revolutionize space technology, SpaceX and Musk arrived in Boca Chica in search of a place to launch rockets, build out a luxury resort, and eventually send one million people to Mars by 2050. In the process, they've been accused of wrecking a wildlife corridor and intimidating local retirees out of their homes and community. SpaceX and local officials maintain that Musk is bringing jobs and diversifying the economy of one of the poorest counties in the United States. Between Musk and Mars provides an intimate look at the holdouts who refuse to leave the isolated village and the tactics SpaceX has been using to get them out of their homes. But as the star-gazing magnate moves forward with his vision for a Martian colony, some of the locals won't cede their slice of Planet Earth without a fight.