Dana Johnson's sister, Brandy, gets everything she wants. When Brandy demands an egg hunt for her birthday, the Johnson family hosts an egg hunt for Brandy and her friends. Dana and his friend, Anne, also join the hunt. While searching, Dana finds a very peculiar egg; it is pale green, with large veins lining the sides.
Dana puts the egg in his room. The next morning, Dana wakes up to a cracking sound. The egg hatches, and a yellow, blob creature comes out. Dana piles the creature into a shoe box. Eventually, he decides to take the creature to the scientific laboratory in town. When Dana gets to the lab, he's greeted by a man named Dr. Gray. Dana shows him the creature he's found. Dr. Gray explains that the creature is one of many that came from Mars and fell to Earth. Dr. Gray brings Dana into a cold room. The room contains numerous other egg monsters. Dr. Gray explains that the creatures melt if it gets too hot, so they need to be in a cold environment. Dana is then told he won't be allowed to leave. Dr. Gray proceeds to keep Dana captive, saying that the boy may have contracted alien germs or diseases.
The room Dana is in is so cold that he's worried for his safety. The egg monsters merge together into a blanket and warm Dana. The next morning, Dr. Gray sees that the monsters have merged, and he accuses Dana of ruining the creatures. Dr. Gray threatens to kill Dana, but the monsters jump on the scientist. Dana runs away, and he gets his parents. When they return to the laboratory, the egg monsters and Dr. Gray are gone.
Dana goes home. After lying in bed for a while, Dana goes outside, feeling incredibly happy. Unexpectedly, he crouches down on Anne's lawn and lays a massive egg.
Dana is good-natured, but he's easily annoyed by his sister, Brandy. Dana is incredibly interested in science.
Dana Johnson is twelve years old. He has glasses and straight, black hair. He is slightly heavyset.