In Regensburg, a bank is robbed in quick succession, a garage containing a dead man is blown up, and the blood-smeared sports bag of twelve-year-old Moritz Kienle is found. Through targeted investigation by Ellen Lucas and her team, it quickly becomes clear that all three incidents are related. In the garage, which turns out to be a drug lab for crystal meth, not only a charred corpse is recovered. You can also find banknotes from the robbery. The investigation leads Commissioner Lucas to Robert Kienle, the tenant of the garage, who is initially untraceable. Is he the dead body that was found? Inspector Alex Eggert researches Sophie Kienle, Moritz's mother.
Like many of her neighbors, Sophie Kienle became addicted to crystal meth and had to leave her son to the child's father, Robert Kienle. After taking crystal meth, Kienle came up with the idea of making the drug himself and selling it in small quantities in order to save the family from increasing poverty. Drug dealing destroyed the entire family and their future together. The investigations are expanded because there is still no trace of Moritz. Then Lucas' suspicions are confirmed: the dead man in the garage is not Kienle, but probably his business partner Potthast.
Did Kienle kill him? And what did they use the money from the bank robberies for? A hot lead leads to the Czech border area, where Inspector Lucas and her team have to delve deeper and deeper into Mafia-like structures in order to finally apprehend the perpetrator.