A Florida hairdresser, Anne-Marie, is shocked to learn her astronaut daughter, Lindsay, is leaving for a mission to Mars in three weeks. After crying for days, desperate Anne-Marie decides to go for broke and sneaks on board. The ship is well on its way when the crew discovers the extra passenger. The cherry on top is that Anne-Marie has taken her cat, Lucky, along as well. Everyone is furious, especially Lindsay - Anne-Marie's stunt is really selfish and dangerous, and there's no turning back.
But during the trip Anne-Marie starts to get the hang of things. And who doesn't love a great haircut! Anne-Marie sets up a small salon, makes friends and starts dating the ship's doctor. But there's trouble ahead - Anne-Marie and Lindsay will have to unite to try to save the mission.