Miriam Monroe and John Conrad are two young scientific workers who, independently of each other, have discovered a chemical called exonite. Miriam discovered it while searching for a cure for cancer, while Conrad used it as a basis for a powerful explosive.

Jude Hunter (Katherine Hughes) is a committed musician who is in the middle of preparing for the biggest and most important performance of her life. When mysterious, unprecedented, and seemingly connected deaths occur as the competition draws near, she begins to feel unsafe, thinking that she might be the next target.

Playboy Teddy Ward wants to marry Jeannie King, an artist, but his father wants him to marry Loris Lane, but tells Teddy he can marry whom he pleases if he will make the Mountain Inn a profitable operation. Teddy agrees, and with the support of his friends arranges an ice-boat race with a $10,000 prize to the winner. A problem arises when his father refuses to pay such an amount. Teddy thinks one of his friends will win the race and refuse the prize, but champion racer "Duke" Slade shows up and Teddy knows he will take the money. Some movie stars show up and, while using their own names, are definitely not playing "Self" in this fictional film.

Billy Martin is sent to New York to put through a war contract for his father, a new England manufacturer, and takes $100,000 as a security. The munition broker's secretary, a crook, tells Graham, a gambling house keeper, of Billy's coming. Miller is detailed to lure him to the gambling house.

Wealthy capitalist, Clinton Reynolds, and his wife, Laura, have lost their son, Arthur, kidnapped and possibly dead. Attempting to write a wrong in his factory, he adopts the daughter of one of his workers who is killed on site. The girl, Rose, grows up resentful of her adoptive father and as she grows older, seduces him in order to break up his marriage. Long lost Arthur returns and, finding his parents' married life in disarray, becomes romantically involved with Rose in order to end the relationship she has forged with his father. Reynolds comes to his senses and makes amends with Laura, at which point Arthur leaves Rose.

Helen Merrill sings and dances in the rough Western mining town of Nugget City, where she befriends Myrtle Cadby, whose husband Jake cruelly abuses her. After a particularly vicious beating, Myrtle, seriously injured, shoots Jake. As she lies dying, she gives Helen a letter of introduction to a man she was to have married in the East, urging her to leave Nugget City. Before she leaves, Helen overhears Bill Sheridan and "Snipe" Roach scheming to sell Charles Taylor, a wealthy New Yorker, a salted mine, with the assistance of George Reed, Taylor's mining agent. Helen goes East and learns that Taylor is the man whom Myrtle was to have married, but because she immediately falls in love with him, she conceals her own identity and masquerades as Myrtle.

A German spy who is married to Lillian, the sister of Rosie O'Grady.

Pancha O'Brien, the beautiful and spirited daughter of an Irish ranch owner, is loved by two men, Sheriff Jack Webb, whom she loves, and outlaw Jim Dyke, whose attentions she repeatedly rebuffs. Jim and his men attack Pancha's ranch, burning it to the ground and killing her father. The outlaw carries her to his cabin, where Wan-o-mee, his jealous squaw, tries to stab the girl....

Patricia O'Rourke, a good-natured prankster who works as a copy girl for the Sentinel , angers her co-worker Stubbs and is about to lose her job when the managing editor offers her one more chance. Her assignment is to explain the clue that links the Hope Mission, a derelict home run by millionaire Hunter Mason and his secretary, Monty Latham, with a series of local robberies. When Hunter discovers Patricia in his office, he assumes that she is a crook in need of reforming and takes her into his home to be cared for by his mother.....

A kooky waiter and sometimes vaudevillian promises to get his employer's daughter into a Broadway show. When he kidnaps the show's star, she gets her opportunity, as the understudy, to play the role and become a star herself.