Mr. Gold and Regina send Ariel back to Storybrooke with an item that will allow Belle to locate a hidden artifact that could help take down Pan. But unbeknownst to them, two men have broken into the town with the intent to stop them - at all costs. Meanwhile, Emma, Neal and Hook attempt to find Dark Hollow, where Peter Pan's shadow dwells, in order to capture it, and Mary Margaret is upset with David for keeping his poisoning a secret from her.
Spoilers ahead. Coverage follows the scope labeled below.
Complete story — includes the ending
Emma, Neal and Hook travel to the darkest part of Neverland to capture Pan's shadow, but the mission is jeopardized by the men fighting over Emma's attention. Elsewhere on the island, Peter Pan steps up his game in manipulating Henry, using a captive Wendy Darling to do so. Meanwhile, Ariel is sent to Storybrooke by Mr. Gold and Regina to help Belle find Pandora's Box, an artifact powerful enough to defeat Pan.