Augustine, a brilliant, ageing scientist, is consumed by the stars. He has spent his entire life searching for the origins of time itself. He has now been left alone on a remote research base in the Arctic circle, all communication with the outside world broken down. But then he discovers a mysterious child, Iris, who must have hidden herself away when the last of his colleagues departed. Sully is a divorced mother. She is also an astronaut, currently aboard The Aether on a return flight from Jupiter. This is the culmination of her career, the very reason for all the sacrifices she has made - the daughter she left behind, the marriage she couldn't save. But then something goes wrong with the ship's communication system. Marooned in the vast silence of space and the achingly beautiful sweep of the Arctic, both Augustine and Sully must find a way to make peace with the choices they have made and find a path to redemption.