In the eerie London fog, two men unexpectedly cross paths one fateful night, only to be unsettled by their striking resemblance to one another. Jack Chilcote MP is a burgeoning political star, while John Loder grapples with a thwarted ambition. Together, they concoct a daring plan that spirals into a gripping tale of tension, both politically and personally. This captivating story has inspired a play and four films over the years. Tragically, the talented author passed away in 1911 at the young age of 36. (Summary by Simon Evers)