In a small town in Ohio, a young man named John Smith leads a normal life but hides a dark secret: he is one of the nine aliens who escaped from their home planet, Lorien, after it was destroyed by the Mogadorians, an enemy race. Each of them is marked by a number, and John is Four. As he tries to adapt to his new life and blend in, he begins to develop superhuman abilities that make him stand out more and more.
As John settles into his new school, he meets Sarah, a popular girl who awakens in him a deep desire to stay and fight for a normal life. However, their peace is shattered when the Mogadorians, in their search for survivors, begin to hunt him down. As his powers grow, so does the threat.
With the help of Henri, his guardian, and the mysterious Number Three, John must learn to master his abilities and discover his true destiny. As the tension escalates, John faces a dilemma: will he stay to fight for the home he has built, or will he escape once again to survive? With thrilling action and elements of science fiction, this story explores the struggle for identity, friendship, and sacrifice in a world where being different can be deadly.