The curse is broken and the people of Storybrooke, Maine, remember their past. Emma is reunited with her parents. However, just as celebrations get into swing, Mr. Gold has another dark ploy up his sleeve. Plus, Regina's past actions appear to have consequences.
Prince Charming desperately searches for a way to get Snow White and Emma back from the Enchanted Forest. Meanwhile, the Seven Dwarves discover that if anyone leaves Storybrooke, they will lose the memory of their true identity.
Emma, Snow White, Mulan and Aurora head for Snow White's castle to find the wardrobe that sent Emma to earth as a baby hoping they can use it to get back to Storybrooke. In the past, Snow finds out what the gender of her first born will be.
As Emma and Hook climb a beanstalk in search of a magic compass, Emma thinks about her past and how she met Henry's father. Meanwhile, Aurora in the Enchanted Forest and Henry in Storybrook both have the same nightmare.
When a murder occurs in Storybrooke on a full moon, Spencer (King George) tries to bring the town against David by implicating Ruby. Back in fairy tale land, Red finds a pack of wolves who adopt her into their family.
Aurora attempts but fails to communicate with Henry in the Netherworld in order to give Mary Margaret and Emma a portal back to Storybrooke. As a result, Mary Margaret and David go to the Netherworld themselves to try and communicate.
28 years ago, Regina enlists the help of Hook to find and kill her mother, the Queen of Hearts, to stop her from traveling to the new world. Meanwhile, in the present, Emma, Snow, Mulan, and Aurora head to Rumpelstiltskin's old cell to retrieve the key to their return to Storybrooke.
Hook and Cora arrive at Storybrooke and plan their revenge while Regina struggles to regain the trust of the rest of the town. Matters worsen when a beloved resident is killed and Regina takes the blame. Back in the fairy tale world, Snow and Charming disagree over how to handle Regina now that they have taken over the kingdom.
Mr. Gold finds a way to cross the town boundary without losing his memory but his efforts are ruined by Hook, forcing Belle to try and save his plans. Back in the fairy tale land, Belle seeks adventure by trying to destroy a monster that plagues the town. Along the way, she meets and befriends Mulan.
Minutes after the accident, Emma, Mary Margaret, David and some of the other town members try desperately to keep the true nature of their town secret from the newly arrived stranger. While they seek out the disappearing Dr.Wale, Mr.Gold tries desperately to recover Belle's memory. Back in fairy tale land, Dr. Frankenstein embarks on his greatest experiment.
Mr. Gold and Emma, accompanied by Henry, depart on their journey. Back in Storybrooke, Mary Margaret, David, and Leroy stumble upon Anton, the giant, who is out to murder David. Back in fairy tale land, the giant Anton visits the humans of his world and runs into Prince James and "Jack".
While Emma, Gold, and Henry chase after Baelfire, Regina, Cora, and Hook search the town for Rumpelstiltskin's sword in an attempt to destroy his power. Back in fairy tale land, a valiant Rumpelstiltskin is called to war but encounters dark forces along the way.
In the fairy tale world, Snow White's birthday ball is put on hold when her mother, Queen Eva, is taken ill. Back in Storybrooke, Hook, Cora, and Regina set out in search of Rumpelstiltskin's dagger. Mary Margaret reconnects with Johanna.
In the fairy tale world, Cora, the miller's daughter, seeks revenge against the royal family after they degrade her in public. Back in Storybrooke, as Cora and Regina continue their quest to find Rumpel's dagger, Emma, Neal, David, and Mary Margaret protect Gold and prepare for battle.
Emma and David enlist Gold's help to protect Mary Margaret from a vengeful Regina while Henry searches for a way to destroy magic in Storybrooke. Meanwhile, back when the spell was originally cast, Regina seeks the company of a father and son who stumble into Storybrooke.
Mary Margaret begins to deal with her guilt concerning the death of Cora while Neal's fiancée arrives in Storybrooke. Meanwhile, back in Phuket, August seeks the help of a healer known as the "dragon" when he starts to turn into wood.
Wrestling with the threat of the prophecy, Gold attempts to bring back Belle's memories by spending more time with her. Flashbacks to the fairytale world show Belle just after she was imprisoned by Rumpel. Meanwhile, Mary Margaret and David reveal a secret project they have been working on to Emma.
When she finds out that David and Mary Margaret plan to return to the Enchanted Forest, Regina searches for the fail-safe key that will destroy Storybrooke. In the fairy-tale world, Queen Regina continues her search for the bandit Snow White. Emma begins to suspect Tamara's motives.
When Regina goes missing, Emma immediately suspects Tamara. After Bae leaves the magical world, he lands in London, England and stumbles upon the Darling house where he meets Wendy and her brothers. Meanwhile, Gold shows Lacey his magical powers.
As Greg and Tamara set out to destroy Storybrooke, Regina tries to delay the destruction so that the rest of the town can escape. Meanwhile, Hook takes Bae on as a crew member on his ship, ignoring Smee's advice to use Bae to exact revenge.