Megalomaniac and would-be world dominator Roxor has kidnaped Robert Regent, along with his death ray invention, in hopes of using it to degenerate humanity into mindless brutes, leaving himself as Earth's supreme intelligence. Faced with revealing the machine's secrets or allowing his family to die a horrible death at the hands of Roxor, Regent's only hope lies with the intervention of his brother-in-law, the be-turbaned yogi and magician Chandu, who has the power to make men see what is not there 'even unto a gathering of twelve times twelve'.
Noted gunman Black Jack and his friends arrive and take jobs on the Allen ranch. Allen's hands have quit and his cattle are being rustled. When one of Black Jack's friends is killed by the rustlers, he finds the killer and when they fight his Marshal's badge drops out and Ruby, the leader of the rustlers, picks it up. With his identity now known she sets a trap for him.
A federal agent goes undercover to infiltrate a drug smuggling operation headed by a mysterious Mr. X, a criminal mastermind whose identity is unknown even to his henchmen. Mr. X is also running a bogus hospital where victims are killed on the operating table, and their coffins stuffed with narcotics. The drug-filled coffins are then buried in a cemetery.
When Polly Fisher, a circus aerialist, is hurt while performing, she is taken to the house of a nearby minister, John Hartley. As she recuperates, they fall in love with each other and secretly marry. But when the truth leaks out , John's congregation rebels at having a circus woman as their minister's wife, and he is fired. Polly decides to leave John in hopes of giving back to him the calling that means so much to him. But fate steps in and rearranges all plans.
An old yet spry man comes to Chicago to live with his son and daughter-in-law. Despite the old fellow's good intentions, he becomes a useless irritation to the couple. However, Grandpa befriends a young orphan boy, whom he helps to set upon the straight and narrow path. He finds solace in this relationship and also in the company of elderly men who live in a home nearby.
When a hot young prosecutor learns that a man he got convicted and executed was in fact innocent, he quits his DA job and becomes a defense attorney. He grows rich and powerful defending guilty racketeers, but eventually sees the errors of his ways.