William Foster is a slick attorney who stays within the law, but specializes in representing crooks and shady characters. He's adept at keeping them out of jail, winning acquittals, and having decisions reversed, thus springing criminals out of prison. He is romantically involved with dancer Irene Manners, who is two-timing him, although she wants to marry him. She kills a man driving while out with her other man, Jack Defoe, who takes the blame. Unfortunately, a ring Foster had just given Irene is found at the crime scene. Foster ends up defending Jack, but when the ring is found, he thinks he is protecting Irene, so pleads guilty to jury tampering.
A distinguished English gentleman has a secret life--he is the notorious jewel thief the press has dubbed "The Amateur Cracksman". When he meets a woman and falls in love he decides to "retire" from that life, but an old friend comes to him with a predicament that entails him committing one last job.
Convicted of manslaughter for a drunken driving accident, Kent Marlowe is sent to prison, where he meets vicious incarcerated figures who are planning an escape from the brutal conditions.
'Natural' Davis (William Powell) is a respected gambler who follows a ruthless code of honor with those who cheat against him. His wife, Alma (Kay Francis), wants to divorce him because of his addiction and lifestyle, but they agree on a reconciliation and second honeymoon together and 'Natural' promises to give up gambling. However, his plans change when his brother, 'Babe' (Regis Toomey), arrives in town looking to score big, and 'Natural' has to devise a plan quickly to put him off gambling forever.
During a raid, a cop lets a pretty speakeasy employee escape and later begins dating her. Although she loves him, his salary and dull life leave her wanting.
After a vaudeville performer is murdered backstage, framed-up evidence lead the police to arrest a troupe member. At his trial, Hermann, a Scandinavian clown known as Beppo, is the lone juror holding out against conviction and pleading for his innocence and acquittal.
London, 1929. Frank Webber, a very busy Scotland Yard detective, seems to be more interested in his work than in Alice White, his girlfriend. Feeling herself ignored, Alice agrees to go out with an elegant and well-mannered artist who invites her to visit his fancy apartment.
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 criminal known as Thunderbolt is imprisoned and facing execution. Into the next cell is placed Bob Moran, an innocent man who has been framed and who is in love with Thunderbolt's girl, without knowing of their relationship. Thunderbolt hopes to stave off the execution long enough to kill young Moran for romancing his girl.
Chick Williams, a prohibition gangster, rejoins his mob soon after being released from prison. When a policeman is murdered during a robbery, he falls under suspicion. The gangster took Joan, a policeman's daughter, to the theater, sneaked out during the intermission to commit the crime, then used her to support his alibi. The detective squad employs its most sophisticated and barbaric techniques, including planting an undercover agent in the gang, to bring him to justice.
An escaped convict and the detective tasked with hunting him down end up working in parallel to clear the convict's name and nab the gangsters that framed him.
Joan Fry, a society woman, falls in love with Chuck Riley, the white-leader of a powerful gang in Chinatown, and he quickly drags her down into the depths with him. But seeing her so much in love with him causes him to realize he isl in love with her, and he determines to lift her up again. "Boston" Charley, the rival gang-leader, has other plans.
A beautiful showgirl, name "the Canary" is a scheming nightclub singer. Blackmailing is her game and with that she ends up dead. But who killed "the Canary". All the suspects knew and were used by her and everyone had a motive to see her dead. The only witness to the crime has also been 'rubbed out'. Only one man, the keen, fascinating, debonair detective Philo Vance, would be able to figure out who is the killer.