Pan's plan threatens the citizens of Storybrooke's joy over Henry's return; Snow and Charming spend their honeymoon searching for a mythical being that could stop Regina.
The race to stop Pan is on as Henry's life hangs in the balance; with Mr. Gold's help, Regina decides to adopt a baby.
Ariel is sent back to Storybrooke with an item that will help Belle find a hidden artifact; Hook, Neal and Emma set out to capture Peter Pan's shadow; Mary Margaret is upset that David concealed his poisoning.