The third collected volume contains the adventures of Yoko Tsuno, in which she travels through time. This includes volumes 11 (The Time Spiral), 17 (The Revenge of the Demons), and 20 (The Astrologer of Bruges). Yoko uses a time machine from the 39th century to visit various eras in order to prevent major disasters. She travels to the time of World War II, to Bali in the year 1350, and to Bruges in the 16th century. Accompanying her is Monya, a girl from the distant future. As always, the volume includes editorial pages that provide insight into the working methods of Roger Leloup.