Europa an icy moon of Jupiter over 480 million miles away from Earth may be our best hope for finding alien life in our solar system. Scientists believe that on Europa there is a liquid ocean buried beneath it's icy crust. To find out if this alien ocean holds life, a team needs to get there, penetrate the ice shell, and navigate in an alien sea. Meet the scientists, adventurers, and engineers who are determined to launch a mission to Europa and follow them through the challenges, frustrations, and triumphs that come with planning a distant mission to an alien world. Through CGI and quests to the edge of our planet, National Geographic goes on a journey to an alien moon to answer the basic question: are we alone in the universe?