For years, professional Vietnamese human trafficking networks have been operating almost unmolested in Germany. They bring their compatriots there and exploit them: in nail salons or massage parlors, but increasingly also in forced prostitution or in drug production. In most cases this crime goes undetected. According to official information, there are hardly any Vietnamese victims of human trafficking in Germany. The real dimension of the problem remains hidden from the general public. This is also due to the fact that the Federal Republic has not yet followed up on its international obligations. A reportage from Adrian Bartocha and Jan Wiese.