When Lasse is very small, he is adopted away, and his mother travels far away. After Lasse's death, Mette Frisk and archivist Adam Jon Kronegh must try to solve the mystery of where Lasse's mother went in order to find his heirs.

A Danish man embarks on a dangerous voyage, which has major consequences. Not just for himself, but also for his descendants. Including his son, who is now dead. The hunt for the son's heirs takes us to several continents. Mette Frisk and archivist Adam Jon Kronegh go in search of heir-entitled relatives of a deceased person and along the way try to find out why the heirs and the deceased have lost contact.