A remake of Frank Capra's Submarine (1928), Devil's Playground is a snappy Columbia "B plus" picture starring Richard Dix and Chester Morris. Submarine officers Dorgan (Dix) and Mason (Morris) battle on land for the affections of dance-hall girl Carmen (Dolores del Rio). She marries Dorgan but makes a play for Mason when her husband is on duty. The romantic rivalry is forgotten when Dorgan must rescue Mason and his crew from a sunken sub.

A master of disguise poses as a wax figure to rob a safe of its jewels.

Dishonorably discharged from the U.S. Marines after starting a barroom brawl that gets his leatherneck buddy "Tubby" Waters killed, hothead "Woody" Davis infiltrates a gang of Shanghai gunrunners to bring the culprit to justice.

After the woman who raised him claims he's not her son, Richard searches for clues about his identity. Urged on by his mentor, Capt. Randolph Courtney, Richard focuses on Julia Trent Anders, a middle-aged actress who just might be his real mother. But soon, Richard begins to fall for Julia's stepdaughter. Amidst the upheaval, Richard schemes to return Julia to the stage -- but he's in for another big surprise.

Buck's friend Sheriff Simpson is after the Juarez Kid. Buck knows the Kid and the Sheriff's description does not fit. Buck then meets a one time outlaw who is now the Sheriff's deputy and thinks he is posing as the Kid. When a rancher is killed by the supposed Kid, Buck has a plan utilizing the real Juarez's Kid's ranch that will trap him.

An Easterner Inherits a cattle ranch, only to discover that thousands of cattle have been stolen. He secretly signs on as a hired hand at his own ranch to discover who's stealing them.

The Llano Kid is robbing stages but only taking money from Montana Slade's Cottonwood Mine. He then gives the money to those cheated by Slade. The Sheriff is after him and eventually obtains a picture and displays wanted posters and is soon after him.

Michael Morda, a young sculptor living in San Francisco, is madly in love with Elinor Hunter, and they plan to be married. When Elinor becomes jealous of Julie Stressman, an old friend of Michael's and one of his models, Michael reluctantly asks Julie not to visit him at his studio. They agree to meet only at the construction site where he is working on a sculpture for which Julie is modeling. When Elinor also shows up at the site, Julie leaves so as to avoid a confrontation, but she is killed by some falling materials. Julie's dying request is that Michael adopt her daughter Mitzi, whose father died years earlier. In order to prevent Mitzi from being taken to an orphanage, Michael lies and says he is her father. Elinor hears this, and without asking questions, leaves him and marries another man the same night.

Dorothy, and her big city lawyer boyfriend, return to the Lazy 'B' ranch to read her late father's will. For Dorothy to inherit everything, she must stay on the ranch for 5 years. If she does not, everything goes to Buck, who is the manager. She does not like Buck, so she makes a deal with the wrong people for cattle and then the outlaws go to the ranch to get the $10,000 from her. But Buck is on the job.