The Palombian jungle is a cornucopia of strange and mysterious animal and vegetal species. Among those, a butterfly whose female has never been captured is the object of the ambitions of many scientists – and competition causes conflicts. A situation that the Marsupilami, who hates having his nap interrupted, finds positively unacceptable … although the opportunities to play with this new treetop research lab that’s suddenly appeared might make up for the inconvenience!