Sarah and Aidan begin to decipher a mysterious document that refers to the origins of Peter Pan and are suddenly pursued by a being that can take any form and will stop at nothing to get what it wants from them.
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.
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.