Emma, David, Regina, Robin and Henry are finally back home in Storybrooke and reunited with Snow, but, unfortunately, they still have to contend with Hades, who continues to deceive Zelena as he lays out his plan to use the all-powerful Olympian Crystal to take over the town. The heroes desperately search for a way to defeat Hades while Hook does the same in the Underworld, looking for those missing storybook pages. Regina and Robin take a more direct approach, which culminates in an epic showdown that will leave our heroes forever changed.
Hades turns to the heroes to ask for help with getting Zelena back from Rumplestiltskin and Peter Pan. In flashbacks, Emma searches for answers about her family and makes an unexpected friendship.
In flashbacks, Ruby and Mulan find themselves in Oz, where they meet Dorothy. After the three witness Zelena's return to Oz, they look for a way to defeat her once and for all. However, Dorothy mysteriously disappears
Gold creates a Storybrooke portal; Zelena and Regina clash; Belle and Rumple are reunited; Snow and David try to send a message from the Underworld to their son, Neal.
The heroes join forces with an old friend of Snow's to defeat an obstacle standing in the way of finding Hook. Meanwhile, Hook encounters challenges of his own.
Kara does her best to support Winn when he hears that his father Winslow Schott Sr. breaks out of prison. His father looks for Winn for a reason to become like him. Cat offers Lucy a job working at CatCo and Alex asks Hank to use his powers to find out and uncover Maxwell Lord's plans.
