Apartment 29

The Mystery Club, an organization of millionaires, draws up an agreement at the instigation of Cranahan, wagering that crimes can be committed without detection by the police; Inspector Burke serves as arbiter. A forfeiture of $25,000 is set, and the members draw secret lots to decide who is to be the criminal. When Burke himself is reported murdered, the members agree to cancel the agreement but cannot find the document.

In her first Paramount film, Billie Burke plays Helen Wentworth, an heiress who's bored with the high life and decides to enjoy a bit of the low life.

Sentenced to be deported from Hawaii, Hung Chin Chung pledges twenty years of service to Henry Drew to escape the certain death that awaits him in China. Rage at his humiliation and inability to marry as a free man smolders in him throughout his servitude, near the end of which he sails to San Francisco with the Drew family. Also on board is Ralph Coolidge, who tries to retrieve from Drew his share of their gold mine, and who loves Drew's secretary, Mary-Will Tellfair. Shortly after their arrival, Henry Drew is murdered; suspicion falls on Ralph, the owner of the murder weapon, a curious Chinese dagger; but subsequent events lead Hung Chin Chung to confess to the crime.

Norma, a dancer, receives many presents from admirers. Among them she finds a peculiar looking box, out of which spring several poisonous snakes. Nelson, a detective, is called upon to solve the mystery.

After Outlaw Slippery Joe robs a miner and his daughter, a sheriff pursues him. While on the outlaw’s trail, the sheriff finds the miner's horse, abandoned by the outlaw, and notices the resemblance between Slippery Joe and Mr. Bond, a man he had encountered earlier who was searching for his twin brother. The miner and his daughter arrive at the ranger's cabin, recognizing Bond as the robber.

The abandoned Balfour House, the owner of which was found dead five years earlier, comes back to life with the arrival of two suspicious sinister-looking tenants.

A woman's cheating husband is murdered at their country estate, and suspicion immediately falls on her.

In Dijon, Inspector Hanaud investigates Betty Harlowe after her uncle, Boris Waberski, accuses her of poisoning her wealthy aunt for an inheritance. While an initial autopsy finds nothing, Hanaud discovers the use of Strophanthus Hispidus—a rare, undetectable poison applied via an antique arrow. Amidst a flurry of "poison pen" letters and deception, Hanaud proves the murder occurred despite the lack of conventional medical evidence.

After Henry Dawson and Robert Harwell quarrel at Elaine Huntington's garden party, Henry disappears and Robert is accused of murder. Although Robert is found guilty and sentenced to death, Elaine, who loves him, believes he is innocent and does everything in her power to help him.

Major Temple vainly tries to purchase of the priests the Green God he sees on a visit to China. He commissions Robert Ashton to get it for him, promising him the hand of his daughter in marriage.

A multimillionaire is murdered, and his will leaves all his money to a beautiful young blonde. The murdered man's son thinks something is fishy, and a homicide cop sets out to find out who was behind the man's death. Complications ensue.

Bored by her hardworking husband, Tess goes to an illegal gambling den with a former suitor, Arthur Sinclair. The den is robbed and subsequently raided by police. Tess loses her rings and lies to her husband about her whereabouts. Her lies are exposed when the rings are found by the police. While trying to manage the fallout, she writes a compromising letter that is intercepted and used to blackmail her for $15,000. After being embroiled in further dangerous, fraudulent activity, her innocence regarding the robbery and associated crimes is established through the confession of a criminal named Peter Vanetti. 

Audacious Jeanne works in a book bindery, is given a diary written by Thomas Dodd to bind. The diary portrays Dodd as a scoundrel who fathered a girl by a woman he never married, and Dodd's family as a nest of vipers. Jeanne decides it is her duty to save this corrupt family and presents herself to Dodd as his illegitimate daughter. In fact, Dodd is a meek old man whose scandalous diary was pure fantasy, and the only hostile member of the family is Dodd's greedy brother Jerry, who was the only sympathetic character in Dodd's diary. Jeanne falls in love with Dodd's nephew Kent, though she dutifully urges him to marry Hazel Jenkins, a woman whom Jeanne believes Kent has wronged. A lost film.

The American consul in Zanzibar is informed that a fugitive American has just reached the African coast, and becomes suspicious of a newly arrived man from Boston, Massachusetts.

After a popular singer dies in a mysterious auto accident, her fiancee assembles all those who were to attend there wedding, hoping to find her killer.

The wife of a TV executive thinks she might have committed a murder and is tormented by a stalker while locked inside an empty TV station.

A mystery writer's son is being held for $1 million ransom.

A young nurse reports to work in a hospital's psychiatric wing and gets involved in a series of mysterious deaths.

Much-married and once successful writer Henry T. Aythecliff, now heavily in debt, summons his three ex-wives to his mansion, planning to extort a sizable amount of money from each. When he is discovered dead, clues indicate that each of his four wives had motive and opportunity to murder him, and a young detective must sift through some ingeniously devised evidence.

A murder is committed at a country mansion. All the guests present at the estate fall under immediate suspicion as investigators attempt to solve the mystery before they strike again.