After the events of "The Time Opener," Valerian and Laureline reverted to childhood, and are now living with Mr. Albert on 21st-century Earth. But in a universe where time travel is a reality, words like "after" and "now" can be somewhat hazy... Elsewhere, in other times, the pair of agents continues to work tirelessly to maintain a galactic peace threatened as always by greed and the thirst for power.