Karin Wegemann has been transferred. Instead of being on active duty at the LKA, she has been teaching prospective colleagues at the police academy for several months. But a life at a standstill is not made for a woman who feels most comfortable in a headwind. The career change brings her neither external stability nor inner peace. Her superiors see this too. One evening, Wegemann meets investigative journalist Maik Fellner. Child trafficking in Germany has been Fellner's topic for years, but his articles ultimately have no effect whatsoever, and his harrowing research is at best denigrated as slander. Fellner needs Wegemann, but he needs her as an active police officer. He puts Wegemann under pressure and tells her about a 14-year-old witness who has put him on the trail of a child trafficking ring in Potsdam. Her investigation puts her in dire straits, because the perpetrators also know that there is a witness.