Blink tells the story of the Pelletier family, a happy, adventurous family of six, who decide to go on a world tour after learning three of their four children will soon lose their vision to retinitis pigmentosa, a rare, incurable disorder that leads to permanent blindness. The family sets out on a once-in-a-lifetime trip to experience all of the beauty the world has to offer while they can still see it. The film follows the Pelletiers on their journey as they prepare for the inevitability of the future.