In present-day Paris, Diana receives a photographic plate from Wayne Enterprises of herself and four men taken during World War I, prompting her to recall her past. The daughter of Queen Hippolyta, Diana is raised on the hidden island of Themyscira, home to the Amazonian women warriors created by Zeus to protect mankind. Hippolyta explains the Amazonian history to Diana, including how Ares became jealous of humanity and orchestrated its destruction. When the other gods attempted to stop him, Ares killed all but Zeus, who used the last of his power to wound Ares and force his retreat. Before dying, Zeus left the Amazons the island and a weapon, the "Godkiller", to prepare them for Ares's return.
Olive Byrne met Marston in 1925, when she was a senior at Tufts; he was her psychology professor. Marston was already married, to a lawyer named Elizabeth Holloway. When Marston and Byrne fell in love, he gave Holloway a choice: either Byrne could live with them, or he would leave her. Byrne moved in. Between 1928 and 1933, each woman bore two children; they lived together as a family. Holloway went to work; Byrne stayed home and raised the children. They told census-takers and anyone else who asked that Byrne was Marston’s widowed sister-in-law. “Tolerant people are the happiest,” Marston wrote in a magazine essay in 1939, so “why not get rid of costly prejudices that hold you back?” He listed the “Six Most Common Types of Prejudice.” Eliminating prejudice number six—“Prejudice against unconventional people and non-conformists”—meant the most to him. Byrne’s sons didn’t find out that Marston was their father until 1963—when Holloway finally admitted it—and only after she extracted a promise that no one would raise the subject ever again.