Valerian and Laureline are spending their holidays in the tourist paradise of the cosmos. The place is jam-packed with billionaires, like that four-eyed stuck-up madam who doesn't stop complaining, or the mega-rich caliph of Iksaladam with his harem and his obnoxious heir. Valerian and Laureline are a little bored, but that won't last. One night, the Quatuor Mortis (trafficking, contraband, assassinations etc) rocks up with an explosive schniarf and kidnaps the caliph... and Laureline with him!