A crossover sequel to Geronimo Stilton: INTERPOL-The Adventures of The Ghosts. Colette's fashion designer friend, Julie, participates in a women's tactical gear designing competition held and sponsored by Interpol with five other competitors. With The Rodent's Gazette crew invited along with a few new friends and allies to attend, all six designers are kidnapped by a resurrected enemy of The Crew. Will they be able to save them and defeat their old foe once and for all?