After saving a young girl during a hurricane, Diana begins to feel homesick and decides to return to Themyscira. When she arrives, however, she finds her home in ruins and all of her fellow Amazons [[TakenForGranite turned to stone]]. She investigates and finds the wizard Felix Faust, who decides to make a deal with her: if she finds three magical artifacts within 24 hours, he will restore the Amazons back to their original selves.
Diana agrees to the deal, and heads out to find the artifacts. However, she is found out by Superman and the others, but they agree to help Diana in her quest (except Batman; he decides to go off and snoop). Each pieces is guarded, but the Justice League manages to overcome these obstacles and fetch the artifacts. Meanwhile, Batman has found Faust's aprartment, and learned why he wants the artifacts so badly: when combined, they form a key to the gates of Tartarus, and Faust intends to release Hades [[DealWithTheDevil in exchange for ultimate power and knowledge]].
Diana delivers the key to Faust, who holds up most of his end of the bargain and restores Diana's mother Hippolyta. Before he can double cross the two, the Justice League attacks with intention to get the key away from Faust. He manages to fight them off and open a portal to Tartarus, allowing Hades to cross over into the real world. the Justice League pursues him, and after a fight against Hades' army Diana manages to destroy the key, sending both Hades and Faust back to Tartarus and closing the gates for good.
So, the day is saved, but Hippolyta is angry at Diana for breaking Amazonian Law and allowing men onto the island. As punishment, Diana is banished from Themyscira, and despite the others trying to argue her case Diana accepts the punishment and leaves.
* ArtifactOfDoom: Three of them; combined, they form a key to Tartarus, which would allow Hades to enter the mortal realm.
* BadassBoast: Wonder Woman
-->"If you break your vow, no magic in the universe will save you from ''me''."
* BittersweetEnding: Hades and Faust are defeated, but Wonder Woman is banished from Themyscira for bringing the male Leaguers to the island to help her.
* TheDogBitesBack: Faust after what Hades did to him, though it ultimately gets him killed.
* TheDragon: Faust, to Hades. He is also TheHeavy for most of the two parter, as Hades isn't actually released until near the end of the second episode.
* FromNobodyToNightmare: Faust goes from a researcher of ancient mythology to Hades' [[TheDragon Dragon]].
-->'''Wonder Woman:''' How can females wear such ridiculous garments?\\
'''Superman:''' ''(amused)'' You got me.
* OffWithHisHead: Combined with TakenForGranite.
-->'''Batman:''' [Faust] swore revenge on those that mocked him, and several later disappeared under mysterious circumstances.\\
'''Wonder Woman:''' I have a pretty good idea what happened to them.\\
''(Wonder Woman points to three horrified stone faces mounted on the wall)''\\
* TakenForGranite: Every Amazon on Themyscira. They get better after Hades and Faust are defeated.
* UngratefulBastard: Rules of the island or no, you gotta admit the banishment is pretty harsh just for getting some much needed help.
* TheWorfEffect: Wonder Woman knocking Superman around (when a spell made them both think they were really fighting monsters) is a frequently cited example. However, Superman was doing fine initially, but then he realized what was happening. He only got knocked around when he stopped fighting and tried to reason with her.
* YouCantGoHomeAgain: Diana is banished from Themyscira for allowing men to come on to the island.