Roswell follows the experiences of four teenagers - Max Evans, Isabel Evans, Michael Guerin and Tess Harding who live in the city of Roswell in New Mexico. While they first appear to be normal teenaged residents, they are, in fact, not of this planet. Their true identities are revealed one fateful day when a classmate, Liz Parker, gets caught in the crossfire between two customers at the diner where she works. Liz is fatally shot in the stomach and Max uses his special powers to heal her. The four teenagers are then revealed to be human/alien hybrids sent to earth as replacements for the royalty of an alien race. They are destined to someday return to their home planet to save their kind.