When their cousin is stung by a cavefly and falls into a deep sleep, Geronimo and Thea set out in search of the rare pink stinkrose, whose petals are thought to provide a cure.

Un misterio roedor naufraga en la Isal de los Ratones: se llama Pirat-Ruk y es un pirata prehistórico que anda tras la pista de un valisos tesors. Para Geronimo Stiltonut será el comienzo de una aventura superratónica que lo llevará a buscar el Tesoro Perdido de las Prehistorratas Piratas ... A mysterious rodent has been shipwrecked on Mouse Island. He's a prehistoric pirate, and he's searching for a lost Stone Age treasure! Geronimo Stiltonoot...