In the future, the world is undergoing a severe water crisis. People on Earth talk about it constantly throughout the first episode of "The Silent Sea" which consists almost entirely of forgettable tedious exposition. We know their rocket is going to crash, since we saw that happen in the first scene. Why the rocket crashes is a mystery the surviving crew members don't appear to consider too important as they start to move to the moon base in the second episode, The Silent Sea, Bae Doona, Choi Hang-yong, Gong Yoo, Heo Sung-tae, Kim Sun-young, Lee Joon, Lee Moo-saeng, Park Eun-kyo