In the first season of The Sky Machine, science collided with conspiracy theories and a strange secret was revealed. In season two, set in a Neolithic world, Gilly, a young weather-watcher, starts a journey with her people. Their old gods drive them on, but new gods are watching, and they set high standards. Can Gilly rise to the challenge? And can her friendship with the tribe’s priestess, a follower of the old gods, withstand the strain of the dangers they must both face before they reach their destination?