While transporting Starchild, a child-like alien who has landed on earth, through the woods around Monitor, the young Defenders encounter two alien scouts who attempt to destroy their new acquaintance. With the help of the elder Defenders the scouts are run from the planet, but not before identifying the alien as an evil monster and promising to return. Back at Monitor, Dynak X informs our heroes that an armada of 200 alien ships are on their way to Earth, prompting Flash, Mandrake, Lothar and the Phantom to fly into space to investigate. Meanwhile, Starchild blasts his way out of Monitor and rampages through Central City, with the young heroes on his trail. Amongst the stars, the senior Defenders talk to Roarke, a reptile-like alien, who tells them that Starchild is a genetically engineered being created by the great scientist Shoar Koron, and he has limitless powers- which he has previously used to wipe out entire civilizations. The aliens intend to destroy Earth, thereby ridding the galaxy of the child. The young Defenders learn that Starchild is not really evil, but like any child he requires love and attention. Mandrake impersonates Koron to explain to Starchild that he must use his powers for good, not bad, and the little alien makes peace with all the space ships, before streaking away into the star system.
