Elvey-Gartside Productions

Suave supercilious Carling (Karel Stepanek) receives several callers to his isolated house, all of whom hold a grudge against him. Next morning a corpse is found, and later identified as his by one of the visitors.

When a sickly Victorian woman dies suddenly, a postmortem reveals that her body contains a fatal dose of arsenic. Suspicion falls on her husband and her companion, who are lovers. Inspector Martin of Scotland Yard solves the mystery of her death... over a cup of tea.