In1843, Edinburgh artist, David Octavius Hill, is commissioned to paint the portraits of 400 ministers who have broken away from the Church of Scotland. Only when he meets Robert Adamson, an early master of the new and fickle art of photography, does this daunting task begin to look feasible. Hill is soon bewitched by the art of light and shade. He and Adamson become the darlings of Edinburgh society, immortalising people and places with their subtle and artistic images. In the Blink of an Eye is a re-imagining of Hill's life in the words of those who were beguiled by his artistry and charismatic charm. Tender, tragic and sometimes humorous, these voices come together in a story of art and science, love and loss, friendship and photography.