Catherina Strandquist was chocked to find out, at an adult age, that her biological father is an American fighter pilot. He does not leave her any inheritance, but she does find out that she has a half brother in Germany. When Kattis Ahlström and Niklas Källner take on the case, Catherina has already been searching for her brother for 20 years. This episode also features a follow-up to the episode about the sponsored child who disappeared from 2019.