Matula’s friend Adam, a computer freak, has developed a computer program that enables the user to plunder bank accounts. Unfortunately for Adam, he decides to take a cut on the profits – something that does not amuse his vicious underworld clients. They kidnap Adam’s sister and demand the ransom money within a few hours. Matula, who had been following them, is also kidnapped – which leaves Lessing alone to figure out a solution. The situation comes to a head in a dramatic showdown in the lawyer’s office.