While visiting her father, President Tiberius, Maple learns that he is planning an attack on none other than...Santa Claus! Determined to protect her friend at the North Pole, Martha gathers her top agents and shares a big secret. Together, they will meet N.ZERO-L, a super-advanced computer entity, and will affront the most dangerous criminals (of course, they don't get a gift this year...or maybe just a small one).

First published in French in 2019 by Presses Aventure under the title La nuit de la fin du temps.