The Palombian jungle is a cornucopia of strange and mysterious animal and vegetal species. Among those is a butterfly whose female has never been captured, and it is the object of the ambitions of many scientists. This 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!