The Creature Walks Among Us

After the escape of the toadman from the aquarium, a group of scientists led by Dr. Barton and his wife Marsha, as well as Jed Grant as a guide, pursues him to the Everglades region, where he injured a local resident. During a discussion between scientists, Barton states that he wants to conduct some experiments on the captured creature.

During the first dive, Marsha joins Grant and Dr. Morgan, causing her husband's jealousy. The gill man watches the dive. At the depth of the March, she loses consciousness, and the men return with her on board.

Scientists who see the gill man in the water with the help of special equipment, chase him on a boat in shallow water. The monster attacks, and Grant hits him with two arrows with sleeping pills. As a result of the monster's careless actions, his body lights up. A burnt toad-man in a coma is taken to the ship. After taking an X-ray, scientists discover that in addition to the gills, the monster also has lungs, and they perform a tracheotomy to make the atrophied organs work. After the operation, the gill-man begins to mutate, becoming more and more humanoid.

After dinner, scientists discuss the changes taking place with the monster, and at the end of the evening, a drunk Barton behaves rudely with his wife. The toadman, who has got out of his cabin, attacks Grant, who is flirting with Marsha, and jumps into the water. But because of his burned gills, he can no longer breathe underwater, and Dr. Morgan dives after him with an oxygen hose and returns the monster to the ship.

The monster is transported to a remote ranch in California, where Dr. Barton has prepared a special enclosure with an electric fence for him. Meanwhile, the doctor's jealousy grows: he interrogates his wife about what she talked about with other men, and after bathing Marsha and Grant together, orders the latter to leave the house immediately. Then, in a fit of jealousy, Barton kills Grant, who is already leaving the house, and, trying to hide his crime, throws the corpse into the toadman's aviary. However, the doctor does not have time to turn on the electricity, the monster breaks out and follows Barton. As a result, the toadman overtakes and kills Barton, after which he leaves the ranch, heading to the sea.