What's the truth about the prosecution witness?

The truth of the prosecution witness is that Wall, a suspect with no alibi, found Fred, a famous criminal lawyer in London, to defend himself. However, Fred has just finished heart surgery and can't go to work immediately. However, due to various doubts in the case and the abnormal behavior of Wall's wife Helm, Fred finally decided to defend Wall despite the dissuasion of doctors and nurses. But when the truth of the case surfaced, what was exposed to the barrister was indeed the greed and ugliness of human nature.

Plot explanation

In the 1920s, a cruel and bloody murder happened in a villa in London, England. The deceased was a beautiful and rich Emily. All the evidence points to Leonard, the heir to his huge estate. At least, that's what Emily's housekeeper Janet accused in court. However, Leonard insists that his girlfriend Roman can prove his innocence, and John becomes Leonard's lawyer.