The Foreman of an Old Bailey jury refuses to accept circumstantial evidence and helps solve murder case.

Black Coffee is a 1931 British detective film directed by Leslie S. Hiscott. Based on the 1930 play Black Coffee by Agatha Christie featuring her famous private detective Hercule Poirot, it stars Austin Trevor as Poirot with Richard Cooper playing his companion Captain Hastings. A famous but hated scientist, Sir Amory, is killed during a house party, and some of his valuable papers are missing. Poirot rapidly determines the cause of death and the motive, then narrows down the suspects to the most likely culprit.

Caterpillar-tractor operator Tom Roberts' mission is to deliver a fragile cargo of dynamite, to be denoted for the purposes of redirecting an anticipated flood.

Sports-loving inventor Richard Shelby develops an "Elasto-Tweed" golf suit then hits the road in hopes of making a few sales. Along the way, he meets Alice Elliott, who mistakes Shelby for millionaire sportsman Timothy Stanfield (Claude King). Forced to go through with the masquerade, Shelby ends up spending what little money he has, and then some.

Sir George hires Hillary Gatt to find out more about Eric who wants to marry Lois. Gatt is murdered and the couple, married, run off to India. Old friend John Beetham sympathizes with the bride who sees that her hubby is a liar and drunk.

A once notorious gunfighter takes a respectable job on a ranch. "Nevada" is charged with protecting the ranch owner's pretty daughter, arousing the enmity of ranch foreman Clan Dillon, who is in love with the girl. The villainous foreman leaks a rumor of his rival's dark past to the sheriff, and the former outlaw is soon on the run again.

Lady Torrent attempts to sell some of her best Parisian gowns to get back into her husband's good books. Confusion ensues following a misunderstanding over an advertisement.

John Meadham, in charge of a West African trading post, wires the home office in London that he is tired and worn out and that they need to send a replacement to take over. The company sends a stiff upper-lipper, Charles Summers, accompanied by his wife, Margaret. An antagonism develops between the two men from the moment Summers arrives.

The English adventurer Tom Lingard gets involved with islanders on a South Seas island, and he also gets involved with Lady Edith and Mr. Travers, a sailing English couple. Tom has an unexpected love affair with Edith and while they are having this affair, Lady Edith husband's boat is destroyed and he is killed.

A successful Broadway star ready to retire from her wild career announces her engagement. But her tumultuous past isn't done with her yet.