Our heroes found Ruby in the Underworld in last week’s ONCE UPON A TIME and this week we’ll get more backstory on the werewolf. Flashbacks to Oz will show Ruby and Mulan searching for a way back to the Enchanted Forrest. There, they stumble upon Dorothy and they also witness Zelena’s return to Oz. The trio team up to find a way to defeat her once and for all, but when Dorothy disappears, Ruby’s search for her new friend lands her in the Underworld. Now reunited with her Storybrooke friends, Ruby, Emma, Regina and Snow continue searching for Dorothy. Snow and David also struggle with being away from their son, Neal, and come up with a plan so that one of them can escape the Underworld and return home.
Meanwhile, Hades tells Zelena that Ruby is in the Underworld and Zelena is terrified that her sister will turn on her once she learns what Zelena did to Ruby. She’s determined to leave the Underworld but Hades tries to tempt her to stay, saying that if she leaves now she won’t be able to see her daughter again.