The fairy doctor, Lydia Carlton, is summoned to London by her father.

Lydia debates whether to help Edgar in the quest of finding the Sword of Merrow; Edgar gets wounded while trying to protect Lydia.

Raven meets up with Lydia and Edgar to board a ship for an island.

Lydia is cornered by a member of the Unseelie court on Merrow Island where she cowers before her fate of possibly dying.

The Earl hires Lydia to work for him; the Earl holds a ball and Kelpie shows up to take Lydia back to Scotland; Kelpie wants Lydia to marry him.

Edgar informs Lydia that Paul still can't get the ring off; Edgar wonders about the water horse.