A crazed scientist invents a serum that induces a catatonic state in anyone who gets the injection. He uses the serum to paralyze his enemies, in order to bury them alive.
A man and his wife both have criminal pasts, but have quit crime and are now respectable citizens. One day a member of their old gang shows up and threatens to expose them if they don't help him pull a heist.
When a photograph is taken at the scene of a murder, the camera is tossed out of a castle window to destroy the evidence and lands in the back of a passing car belonging to chemist John Gray who becomes amateur sleuth after developing the film and goes in search of the woman captured by the photograph. When the camera is stolen from his laboratory, Gray's suspicions are further aroused.
A very nervous man named Cartwright comes into Perry's office to have the neighbor arrested for his howling dog. He states that the howling is a sign that there is a death in the neighborhood. He also wants a will written giving his estate to the lady living at the neighbors house. It is all very mysterious and by the next day, his will is changed and Cartwright is missing, as is the lady of the house next door. Perry has a will and a retainer and must find out whether he has a client or a beneficiary.
In Nice, a wealthy widow is charmed by a young man who marries her and manages her finances. He soon starts an affair with her secretary, who proves to be even more ruthless than he is.
While investigating murder cases involving masked rapists, Officer Ling herself is raped and her husband murdered by the suspects, on their wedding night. Rather than relying on her fellow police officers to solve her case, Ling chooses to use her own body as the weapon to take revenge on her violators.
Inspired by the stories of the American writer Raymond Chandler, the classical hero is private detective Phil Marlowe, a romantic cowboy, who takes the law into his own hands in the rough prairie of a large city.
Sasha Rumyantsev, a long-range driver, becomes an unwitting accomplice in a crime committed by the head of the motor depot where he works. The honest guy is accused of stealing a car of a hard-to-find product. The collective of the motor depot amicably stands up to protect their comrade and helps the investigator, Colonel Afanasyev, to find and expose the true criminals.
Detective Philo Vance is in charge of the investigation of several mysterious murders. Things take a turn when he gathers evidence against Major Fenwicke-Ralston.