Alien Brother is about an alien race, light years from Earth, who have been monitoring Earth's technological developments, which have caused a fear that Earth may be close to making space travel to planets such as their own light years away. Concerned over Earth's increased technology and their lack of maturity as witnessed by Earth's increasing political and social struggles and their apparent inability to resolve them, the aliens have developed a way to travel to Earth. Their initial visits end unsuccessfully. However, they finally master the travel and manage to convince an Earthling to merge with them on the basis this partnership can heal the Earthling's son who lies critically injured and who can only be healed through the powers provided by the alien. Little does the Earthling know the significance that merging with this alien will cause. Through a series of adventures, the Earthling and a woman friend begin a trip full of dangers and evidence of other aliens already on Earth. The alien through the human finally brings situations to a head with a confrontation with those who are politically in charge.