Harold Fry is an unremarkable man who has made mistakes with all the important things: being a husband, a father and a friend. And now, well into his 60s, he is content to fade quietly into the background of life. Until, one day – Harold learns his old friend Queenie is dying. Harold leaves home, walking to his post office to send her a letter. And out of the blue, Harold decides to keep walking, all the way to her hospice, 450 miles away.

In the Metropolitan Police's smallest department, the Heritage Crime Unit, an art-loving detective tackles cases connected to the world of art, antiques, collectibles and cultural heritage.