As the Cold War seems to be nearing its end, the director of Argus receives a visit from Tala. The mistress of hell informs Waller of the existence of Madame Xanadu, a homo magi capable of predicting the future. By informing President Reagan of this information, Waller is tasked with locating Xanadu and using her to establish an international surveillance system over the entire population. Xanadu learns from the Stranger about Tala's return to Earth. By searching through her cards and with the help of Stranger, Xanadu discovers that she is now being sought after by the U.S. government. Hesitant to flee the United States, she eventually partners with Zatara, with whom she forms a romance, Etrigan the Demon, and Wonder Woman. Tala, on the other hand, has obtained from Waller the release of Felix Faust and teams up with him and Klarion to sow chaos and get rid of Xanadu and the Phantom Stranger. The series also showcases flashbacks from Xanadu's past, events from the Etrigan film to the present day, including how she became a fortune teller alongside her girlfriend Marisol Del Rios and her efforts to help people in need through her gift of foresight. To track down Xanadu, Waller calls upon the mystical branch of Argus led by Doctor Niles Caulder. Waller and the U.S. government's quest will be in vain when, after defeating Tala, Faust, and Klarion, Reagan is freed from Tala brainwash. Xanadu eventually learns that Merlin is preparing for Satan's return to our dimension.
