After a woman jumps in front of a truck to save her daughter's life, she wakes up in the hospital in a seemingly alternate reality where everyone and everything in her life are different, including her own name.

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.