Realizing that Molly and the other Starcatchers are in danger when the sinister being Lord Ombra visits the island and seems to control people through their shadows, Peter and Tinker Bell travel to England to help save the stardust.

While Peter is away from the island, James and the other Lost Boys insist on exploring a mysterious cave, despite Shining Pearl and Little Scallop's warning that it is a dangerous place, inhabited by a creature known as the Goat Taker.

When shadow creatures search for a secret cache of starstuff that fell to London many centuries ago, Wendy Darling employs the help of Peter Pan and the Lost Boys to protect the Sword of Mercy--the key that unlocks the vault where the starstuff is hidden.