After twenty-two albums of spatio-temporal flights, Christin and Mézières decided to close the saga with a stunning finale, an extraordinary epic in search of the disappeared Earth but also a final surprise for the two heroes. Valerian and Laureline, accompanied as always by a dazzling extraterrestrial bestiary, will first have to triumph over Wolochs, these terrible blocks of inhumanity, to finish in beauty one of the most beautiful adventures of the 9th art.