Bedfordshire Police confront issues thrown up by the mass movement of people across Europe. A man travelling with a young woman on a one-way ticket from Bulgaria is stopped at Luton Airport. Officers from the National Crime Agency believe that he - and another man who has come to the arrivals gate to meet them - may be bringing the woman into the country unlawfully. The story takes a surprising twist when one of the men they have arrested claims he is her father. Cameras follow every twist and turn of the case, as detectives try to discover the truth when so much is obscured by different languages and culture.
