Dr. Gilbert McKenna (Robert Clarke) is accidentally exposed to dangerous levels of radiation. In spite of this, McKenna shows no ill effects. Then, he sits in the sun and is transformed into THE HIDEOUS SUN DEMON! Now, McKenna must avoid direct sunlight or be turned into this raging reptile! So, he hits the road, intent on leading a nocturnal existence.
Unfortunately, there's a flaw in his plan, in the form of a beautiful, blond nightclub singer. This, in addition to alcohol and a night on the beach, is enough to cause big problems.
Then, there's the fact that McKenna already has a girlfriend and an entire daytime life. What's worse, he discovers that it takes less solar exposure each time, in order to change him into a slavering gator-man! This soon leads to violence and death.
Though the monster makeup and McKenna's rampages are pure cheeeze, at least it's the tasty sort. The finale is an acrophobic nightmare!
A highly entertaining beast feast...