Harry and Nikki are on different sides following the suspicious death of banker Bridget Flannery. Her husband Tom, is the main suspect and he insists that she fell down the stairs. Harry conducts the post-mortem for the police investigation whilst Nikki is asked to do one by Tom's solicitor. They both come up with different conclusion about how she died. When Nikki's learns that Tom's first wife, Olga, died in similar circumstances she begins to doubt Tom's innocence.