In this episode, Regina must prove her mettle as a force for good as she tries to protect Emma, while King Arthur and Queen Guinevere throw a celebration for the transplanted heroes that turns deadly.

Back in Storybrooke, six weeks after the events in Camelot, Regina, Mary Margaret, David, Leroy, and King Arthur save Robin Hood's life.

The Storybrooke residents are welcomed with open arms in Camelot, and King Arthur and Queen Guinevere announce that they will throw a ball for their guests.

Prior the dance, Percival visits Regina and woos her with a necklace to wear and she puts it on, but later decides that she cannot go to the ball, claiming that she needs to continue her research to free Merlin.

He also reveals that he knows that she is the Evil Queen and not the Savior, a fact he confirmed earlier by observing her through the enchanted necklace, and that he kept all of this from Arthur because he would have prevented him from killing Regina.

Meanwhile, King Arthur does not blame them for Percival's death, saying that his action was inexcusable, and admits that he suspected Regina's identity, but says that Camelot is a place of second chances.

He later confesses to Guinevere that he thinks that there is something suspicious about the new arrivals, but he has to trust them, as they are his only hope of freeing Merlin and finding the missing piece of Excalibur.

Emma eventually decides to help Regina despite the risk, but the magic triggers her vision of Rumpelstiltskin, who warns her that a price has to be paid if she saves Robin's life.

That night near the pond, the Fury begins pulling out Robin's soul, and Charon the boatman appears as the moon reaches its zenith.

As all five band together, they successfully pull Robin from the Fury (and since the price of a single soul was equally divided among them), which disappears back into the underworld with Charon.

At her house, Emma opens the locked door and goes downstairs, at the behest of Rumplestiltskin's manifestation, revealing the stone with the sword Excalibur in it.

After this failed attempt, the Dark One taunts her, and tells her that in order to complete the task, she will have to pay the price, and it will cost someone dearly.

"[2] Amy Ratcliffe of IGN said of the episode, "Tonight's Once Upon a Time moved the story along on several fronts – we learned a little more about the curse, the state of Merlin, and the danger of Excalibur.