In the Arc Lily’s Father, this involves with Emma & Lily finding her father. Only to their surprise that Lily’s father is a demon known as Diabolico, but he was also surprised that he had a daughter. At first Diabolico wanted to destroy the Charming’s for trying to send his daughter to an abyss, but he soon lost his anger when it means he can be with both the woman he loves, Maleficent, and his daughter, Lily.


In the arc Wrath of the Sea, it mainly focuses on Killian since it involves him meeting with Davy Jones & his crew during Killian's early years as a pirate. After Killian died in season 5, he was supposed to join his crew since they made an agreement long ago. But when Killian died as the Dark One he was sent to the Underworld instead of his crew he was cheated, so Davy Jones is traveling to Storybrooke to acquire Killian's Soul. And the past will be about Davy Jones & how he and Killian met.