Thomas dies aged 66 and rumor has it that he leaves behind a half-sister who can inherit him. But she is not to be found in the Danish archives. Host Mette Frisk and archivist Adam Jon Kronegh have to go back to their after-school friends and go abroad in search of "The Unknown Sister".

Jørgen is just three years old when his father leaves the family without warning. Now - many years later - host Mette Frisk and archivist Adam Jon Kronegh must find Jørgen's heirs. It turns out that the father has been living a secret life. So when Jørgen's inheritance is to be distributed, there are several people in for a surprise.