While kicking around a soccer ball, Malik breaks the window of lgnatius's cabin, but no one saw him do it! When the furious camp superintendent runs out of his cabin, he stumbles on Matt who he thinks is the guilty party. Malik tries to confess his fault, but since no one listens to him, he doesn't insist. Lisa and Matt are going to lead an investigation in order to prove Matt's innocence. According to their grandmother Wapi-Teresa, in the Floopaloo's private gardens, there is a flower that produces« truth pollen ». With the pollen in hand, they are going to be able to unmask the guilty party ! Will they have to spray Malik with the truth pollen in order to make him come clean and confess?

It's been 15 days since Bryan has not washed and the scents he gives off are unbearable! Led by Lisa, the children set up a "commando operation", armed with soaps and shower gels. In the evening in the canteen, everyone is delighted, except Bryan, all clean and hair like a top of the class. At bedtime, Lisa and Matt discover that their bed is occupied by a mysterious guest ... Riton the nutria! Since their friend Bryan has polluted his habitat, he has decided to squat their cabin until his pond is clean!