A policewoman from Berlin who testified against an Arab clan boss is starting a new life in Passau with her daughter under a new identity and with the support of witness protection. The policewoman, who until recently was a group leader in the Mobile Task Force (MEK), now calls herself Frederike Bader, her daughter Mia Bader. In Passau, she meets private detective Ferdinand Zankl. In a supermarket, she rescues him from a violent confrontation with a shoplifter.