Off the coast of Palombia, a freighter is at anchor, immobilised by mysterious engine trouble. It is transporting the Zabaglione Circus and its main attraction: a black Marsupilami! When the animal escapes thanks to a kind clown, he finds himself in the middle of a jungle he has never known. And as if helping out this clumsy newcomer wasn’t enough for the local Marsupilami family, they also have to face the march of progress, as a highway is built through their home!

Deep inside the Palombian jungle lies Monte Urticando, an ancient, nigh inaccessible volcano where millennia old cactuses grow. Every 15 years they flower, and the pollen temporarily drives away most of the dangerous predators. For the Marsupilamis, though, it’s also the signal for a strange and cruel tradition: it’s time for the young Marsus to learn how to fend for themselves, away from the protection of their parents. Will they learn to work together to survive?

In Chiquito, capital of Palombia, the old Marsupilami in the municipal zoo feels his end coming, and would like to die free, in the legendary Marsupilami graveyard. Warned by an escaped parrot, our Marsu sets off towards the city, along with Bip and Sarah, the two jungle orphans, to free his elder. There’s a problem, though: Chiquito is in the middle of a revolution against its latest dictator, Baby Prinz. And in Palombia, revolution is a national sport!

In Palombia, the president is throwing a lavish completion ceremony for a colossal project: a dam across the mighty river Huaytoonarro. An event that couldn’t leave the Marsupilami more indifferent, for he has other piranhas to fry: Mrs Marsupilami has disappeared. Our friend’s nose tells him that it was the doing of Bring M. Backalive, the famous hunter, and he rushes after the kidnapper, soon followed by Sarah and Bip … and then the situation becomes even more complicated!

In Chiquito, capital of Palombia, there are nasty rumours flying of numerous orphans and poor kids going missing. And indeed, one evening, the son of a rich family is kidnapped along with a handful of street urchins after he sneaked out of school. The children are soon put to work in a clandestine gold mining camp. But the illegal prospectors are horrible polluters, and that’s already brought them into a very angry Marsupilami’s sights …

Noah, Donald and Solorio, having rescued the rest of the children kidnapped by the ruthless gold prospectors of the Palombian rainforest, have escaped up the Boavista River, despite the rumours of terrible danger in that region. One evening, frightened by, yet drawn towards, demented laughter in the distance, they discover a lost temple, and at its top, a mysterious light. Worried about them, the Marsupilami soon joins them again – and not a moment too soon …

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!