**SPOILERS** Predictable movie, up until the final few minutes, about a major change of life, or soul, of a decent person about to be married to his childhood sweetheart. Who turns into a cold blooded serial murder due to a sudden switch in personalities.
Having studied and put into practice his theories of life after death in the laboratory, with dogs and cats, Dr. Dick Clark,Edward Keane, thinks that he can do the same thing with human beings. Fascinated with convicted serial murderer Wolf Panino who's due to be executed by the state Dr. Clark asks him if he can donate his body to him or science after he's put away for good by a 2,000 volt jolt of electricity. But the unfeeling for the future of humanity and arrogant Panino told the good doctor to take a hike and get lost.
Attending a party at the home of his good fiend Hobart Bennett, Fredrick Burton, who's son Philip, Edward Norris, is soon to marry young and pretty Louise Hammond played by a very young looking but, 67 years old if you believe she was born in 1875, grandmotherly Eleanor Lawson. Taking a ride home in his car it seems like Philip has been driving for some time as he swerves to avoid a truck and crashes right in front of his father's house with his head smashing against the car's dashboard. Not bothering to get Philip to the hospital Mr. Bennett together with Dr. Clark and Prof.Toller, Hugh Sothern, take him into the house only to find out that he died of shock.
Hobart pleading that Dr. Clark save his son's life through the use of Soul Transmigration, that he perfected in his laboratory, has the doctor do just that! But what nobody knew at the time was that the convicted killer Wolf Panino was being executed at that very moment and his soul was "transmigrated" into Philips body! This resulting in the resurrection of the dead murderer. You can easily imagine the rest of the movie with Philip, now controlled by the dead murderer Panino personality or soul, going back to his old hunting grounds in the city slums and taking control of his old gang. After offing it's new leader Mitch Larson, Jack Buckley.
Back home Philip's family and fiancée are shocked by the sudden change of his personality. It's isn't until his father and Prof. Toller follow him to his gang headquarters at the Sporadys Bar and Grill that they finally realize just who Philip really is. Philip goes back to the old ways of Wolf Panino murdering anyone who gets in, or tries to get out of, his way including his old girlfriend Helen, Marlow Dwyer. Helen finds out that the new gang leader is from the richer part of town and that his father,Mr. Hobart Bennett, is a major banker in NYC.
Continuing on his crime spree Philip is cornered in his father place, who was throwing a big birthday party for him, and is forced to reveal his "secret identity" after blasting away a cop Det. Bradley, Addison Richards, who invited himself to the party; as he was out looking for Philip after him and his gang committed a warehouse robbery in the neighborhood.
The surprise ending made the movie worth while since it help explain all the ridicules incidents that happened in it as just being a figment of one's imagination after he hit his head a bit too hard.
