When an award-winning foreign journalist reveals the existence of an Amsterdam-based sweatshop known as a "knot shop" that employs and enslaves young girls as laborers, private security firm Rutherford Risk is hired by a philanthropist to find it and shut it down. David "Sarge" Dulwich, Knox's former boss from their government contractor days, knows that Knox's cultural knowledge, combat skills, and sympathy for the abused make him right for the job. Joined by Grace Chu, whose more subtle skills for acquiring sensitive tech information help to balance Knox's improvisational style, he heads to Amsterdam in an attempt to dismantle the child labor operation and rescue the girls. In their way is a crime organization that has permeated the neighborhoods with goodwill turning even the victims' parents against their would-be saviors. With enemies around every corner, Knox and Grace can't tell the good from the bad.