The daughter of Queen Hippolyta, Diana is raised on the hidden island of Themyscira, home to the Amazons, women warriors created by the Olympian gods to protect mankind. Diana is raised on their history and knows that Ares became so jealous of humanity that he slayed the Gods and determined to destroy Mankind. But Zeus left weapons in the guardianship of the Amazons - the sword Godkiller and the Lasso of Hestia, a magical artefact that forces the truth from captives. In 1918, Diana rescues US pilot Captain Steve Trevor when his plane crashes off the Themysciran coast. The island is soon invaded by German soldiers in pursuit of Steve. The Amazons kill the crew and Steve is interrogated with the Lasso of Hestia. He reveals that a great war is consuming the outside world and that he is an Allied spy. He has stolen a notebook from the Germans' chief chemist, Dr. Isabel Maru, who is attempting to engineer a deadlier form of mustard gas under the orders of General Erich Ludendorff. Believing Ares to be responsible for the war, Diana  dons her armour and must leave Themyscira with Steve to locate and stop Ares for good. Her only weapons are her Amazon training, the Lasso of Hestia and Godkiller...