Greg Martens and his wife, former Interpol agent Anne Rossiter, are called back to Vienna by Anne's former boss at Interpol, since their beautiful Russian friend, Julia Saparova, who is now responsible for monitoring nuclear material at various sites in Russia, has disappeared. Afraid that the "merchants of evil" from the former Soviet Union, who are deeply involved in human trafficking, are behind her disappearance, Greg and Anne embark on an international search for Julia, getting drawn into a messy and disturbing web of human and arms trafficking that takes them first to Hungary and then to Montenegro in a desperate bid to rescue, not only Julia, but a group of girls trafficked from Chelyabinsk oblast as well—girls held hostage to facilitate a nuclear heist...