The exploits of FBI Special Agents Fox Mulder and Dana Scully who investigate X-Files: marginalized, unsolved cases involving paranormal phenomena. Mulder believes in the existence of aliens and the paranormal while Scully, a skeptic, is assigned to make scientific analyses of Mulder's discoveries that debunk Mulder's work and thus return him to mainstream cases.
Mulder meets with Agent Arthur Dales' brother (also named Arthur) and is told a tale of a talented negro baseball player from Roswell, New Mexico in the 1940's who may have been an alien that ran away from his colony because of his love for the game.