A Dutch journalist investigates the alleged kidnapping of two Dutch women in North Korea during the 1970s in the sixth episode of a podcast series. The investigation features an interview with Willem van der Bijl, a Dutch stamp collector who visited North Korea 24 times and was briefly detained there. Van der Bijl recounts being arrested and transported in a van outside his hotel. The journalist also speaks with Japanese professor Tsutomu Nishioka, who leads a rescue movement and possesses a North Korean population registry. The registry is being examined for the name of Leidy Kaspersma, as its presence would suggest she is being held in North Korea. The investigation draws parallels to the experiences of a Romanian family connected to a similar case, focusing on the systems of control imposed on those held within the country.