Fiona and Philip visit a church in Port Glasgow to investigate whether a mysterious work depicting Christ after the crucifixion could be a lost masterpiece by one of the great painters of Northern Renaissance art. Art historian Ian Macdonald thought there was something special about the painting, but he died in 2021. Now his widow Marjorie is taking up the case with the aid of the Fake or Fortune? team. Can they find the answers Ian was looking for? Armed with a file of research and a list of seven suspects, they follow this ecclesiastical whodunnit from Scotland to Belgium, into the beguiling world of Flemish art that was once the most accomplished, and prolific, in Europe. In one of their toughest investigations yet, the team discover why it's so difficult to identify the artists behind Flemish masterpieces, and they use dendrochronology - the science of dating wood - to try to find out when the picture was painted.