Feature version of the 1938 film serial FLASH GORDON'S TRIP TO MARS. Flash Gordon fights Ming the Merciless once again to ensure the survival of the Earth.

Madcap society girl June Bolton has a talent for trouble. Trying to evade a subpoena in connection with one of her misadventures, she winds up in jail and has to be bailed out by the family attorney, Dick Clayton. But June is soon in trouble again, this time involved with a mob boss and a shady lady. Exasperated by his wealthy client's reckless escapades, Clayton determines to quit... until he realizes he has fallen in love with the little madcap.

When a deadly Nitron ray strikes Earth, Flash Gordon and his friends travel to Mars to battle Ming the Merciless and his new ally Queen Azura.

A young girl gets involved with a crowd that smokes marijuana, drinks and has sex. She winds up an alcoholic, pregnant drug addict and is forced to get an abortion.

The story of Dr. Charles Randolph, a scientist dedicated to deciphering the secrets of life and death. Aided by assistant David Cochran, Charles conducts experiments that have horrifying side effects. Charles's lonely wife, Elaine, is frightened by his work, and in order to protect her, housekeeper Maria unleashes a torrent of voodoo that wrecks havoc.

Dr. Paul Carruthers is frustrated because he thinks his employers, Mary Heath and Henry Morton, have cheated him out of the company's profits. He decides to get revenge by altering bats to grow twice their normal size and training them to attack when they smell a perfume of his own making. He mixes the perfume into a lotion, which he offers as a gift to Mary and Henry. When they turn up dead, a newspaper reporter decides to investigate.

A playboy takes a job as an assistant district attorney, finds himself up against a tough crime boss and his gang.