When Ben Reith is woken in his London home to be told that his wife Claire has gone missing, it's the start of a global news story, because Claire is an astronaut crewing the UK's first moonbase and she's disappeared into the long lunar night…

Claire is the first woman to set foot on the moon. A biologist taking part in a groundbreaking research project, her disappearance throws suspicion on her fellow astronauts and China's rival base. With hundreds of thousands of miles between them, can Ben uncover the truth behind his wife's disappearance?