A Canadian couple takes their children on a tour of the world in the new National Geographic documentary film Blink, but it isn’t just an ordinary vacation. Three of their four kids, aged between 13 and 7, have been diagnosed with retinitis pigmentosa, an incurable eye condition that will eventually render them blind. Overnight, the lives of the Pelletier family changed forever. The movie begins after the parents, Edith and Sebastien, made their peace with the cards they were dealt, although there is a sense that they will never fully wrap their heads around the tragedy. Still in the process of accepting their new reality, they collect their entire life’s savings and plan a trip across the globe.