Spatio-temporal agents must preserve Earth's future, always. But is it still possible? Galaxity's orders are rather bizarre, lately. Laureline has been left on stand-by in a Scottish castle. Valerian, haunted by recurrent nightmares, has been sent to capture a sentient being as if it were a wild animal - an unsavoury task, to say the least. And on Earth in the 1980s, members of the military and political elites are descending into madness one by one...