After the missing Claire returns with no recollection of what has happened since before the doomed flight of Oceanic 815, Jack and Locke formulate a plan of defense against her kidnapper, the mysterious Ethan Rom, who threatens to kill off the other survivors unless Claire is returned to him. Meanwhile, the disappointment Charlie feels when Claire does not remember him triggers recollections of Lucy, a woman he had let down in the past back in England where Charlie ruined their engagement so he could steal money from her to fuel his escalating heroin addition.