Rollo Martins takes advantage of a case of mistaken identity and steps into the shoes of literary lion Benjamin Dexter.
Rollo makes a dangerous choice when he decides to interview Harry Lime's neighbour about his old friend's death.
After a second death in Harry's neighbourhood, Rollo is no closer to uncovering the identity of the mysterious third man.
Rollo has news for the police: Harry Lime was murdered.
But the police in their turn have news for Rollo.
The scales have fallen from Rollo's eyes and he knows that Harry Lime died a criminal, but a greater shock is in store in the cold Viennese night.
Rollo is beginning to ask questions about the death of Harry Lime.
The police bait their last trap for Harry Lime as Rollo waits at a café beside the hidden entrance to Vienna's great sewer.
But surely Harry is too smart to come.