Benjamin, Trap, and Thea are concerned that Geronimo Stilton works too
hard as editor-in-chief at the Rodent's Gazette. To get him away from
the office, they decide to investigate the mysterious three-headed
brie-smelling monster that is roaming around the port of New Mouse City.
But, things take a turn for the worse, as our heroes find themselves
held trapped like rats on a ship...commandeered by the dreaded Captain
Blackrat. Will it be a pirate's life for Geronimo and his relatives?
Perhaps a cruise is the vacation he was needing!