Bonrath has a new part-time job that nobody knows about. He works as a security guard in a biotech company. But Bonrath has more secrets: he also has a new friend who happens to work for the same company as the laboratory manager. When the company is attacked and the perpetrators steal Botox in large quantities, Ben and Semir come into play, who try to catch the fleeing robbers - to no avail. However, the two find out that the perpetrators apparently had inside information, and of all things Bonrath's new love, Dr. Marlies Eisner, suspected. Bonrath doesn't know if he can still trust Marlies, although she swears that she has nothing to do with the attack. For Semir and Ben, too, the case becomes more explosive that the botox is not only used in the beauty industry, but is also of great interest as a dangerous poison for assassins.