Professor von Volt plans to send Geronimo and his time traveling friends back to King Solomon's court to borrow a ring that supposedly will restore harmony to Mouse Island and balance the environment--but they soon find themselves taking an unplanned detour through Napoleon's court, a Viking village, and the Minotaur's labyrinth, before finally arriving before the wise King.

"Imagine my surprise when I, Geronimo Stilton, was offered the chance to travel back in time again! Professor Paws von Volt entrusted me to lead my family on a secret journey in his new time machine"--Page 4 of cover.