The playground of some children is made unsafe by wolf howls. Pol, Jessi and Waldo are commissioned by Postbus X to investigate. They find the cause in a jogger with cynophobia.
Miss Pluym leaves for Hong Kong and Felix Haantjes replaces her. One day he is visited by a fortune teller, Black Maggie, who puts a curse on him. When Pluym returns she treats Haantjes hostilely. The curse must be undone.
An 11-year-old girl writes to Postbus X that her boyfriend has real hand grenades. Our friends from Postbus X investigate the case and that's how they end up with Michel Follet, the well-known radio and television presenter.
Thanks to the help of Michel Follet, Postbus X was able to have a gang of gun smugglers apprehended by the police. However, the smugglers' gang leader wants revenge and kidnaps Michel Follet.
Postbus X receives a poignant letter from a hopeless mother, whose daughter fell into a kind of sub-comatose state due to a serious traffic accident. The child no longer reacts to the outside world, she can no longer laugh.
A strange young man contacts Haantjes and tells him about a house full of ghosts. Meanwhile, Postbus X receives a letter from a concerned mother. What do the ghosts and this letter have to do with each other?
Broadcaster Andrea Croonenberghs finds a parakeet in her flat that flew in through the open window. Andrea decides to keep the bird. Then two owners present themselves who, each for their part, claim that the parakeet is their property.
