Frank H. Spearman

Smith is an iron-willed railroad detective. When his friend Murray is fired from the railroad and begins helping Rebstock wreck trains, Smith must go after him. He also seems to have an interest in Murray's wife (and vice versa).

In this contemporary update of Frank H. Spearman's Western hero, Whispering Smith is now a sleuth who arrives in London on holiday, but is soon called in to solve the case of a suicide which the father of the deceased woman thinks was murder.

Whispering Smith is a virile, fearless type of the true American whoso theory of life is to give every man a chance to show what is in him. There is nothing of the bully or braggart about him. He is only a man who knows instinctively what is right and never falters in his steps to see that justice is given where it is deserved and crime punished on the same basis. Originally shot as a serial to be called "Whispering Smith", distributor Mutual Films decided to release it as two separate films - this film, which was released first, and Medicine Bend (1916).

Railroad foreman Murray Sinclair is dismissed by George McCloud, division superintendent, for ransacking wrecks. Sinclair along with his henchmen, retire to his ranch and forays against the railroad. "Whispering Smith," engaged by the railroad to restore order, is hesitant in dealing with Sinclair when he falls in love with Marion, Sinclair's wife, who is separated from her husband and operates a small shop in Medicine Bend. Dicksie, McCloud's sweetheart, overhears Sinclair threaten McCloud, and she rides through a storm to warn him; Smith, with the aid of Bill Dancing, tracks down Sinclair and his men, and Bill kills the villain. Dicksie and McCloud marry and take Marion under their protection.

Whispering Smith, a railroad detective, is sent to Medicine Bend to suppress the looting of cars.

Irrepressible Helen Rhinelander, the daughter of a railroad president. A dastardly villain, Segrue, however, desires not only Helen but also the plans for a new railroad. Happily, Helen's childhood sweetheart, Paul Storm, now an engineer, is right there to protect the damsel-in-distress through the serial's 15 exciting chapters.

O'Brien is "Whispering" Smith, so named because he speaks softly but knows how to fend for himself. The son of a railroad president, Smith is determined to learn the business from the ground up, so he gets a job as a track walker for his dad's rail line. While going about his duties, he meets Nan Roberts (Irene Ware), who is about to sell her Colorado ranch. Smith finds out that there are valuable tungsten deposits on her land and makes certain she won't be cheated by the villains

When a bank is on the verge of collapse, its president, George Fuller, uses his own fortune to cover its losses. Unknown to Fuller, however, Monroe Simmons, his vice-president, is undermining the bank for his own purposes. Then Tom Williams, who is in love with Fuller's daughter Ethel, asks his uncle, famous detective "Whispering Smith," to investigate the case.