Based upon Wilkie Collins Victorian mystery, the gothic tale tells of a pair of half sisters whose lives end up caught in a grand conspiracy revolving around a mentally ill woman dressed in white. As the story unfolds, murder, love, marriage, and greed stand between the two women and happy lives. Their only hope is the secret the woman in white waits to tell them.

SPOILER: In the original novel, the secret was that Sir Percival Glyde's mother and father were not married (his mother's husband had been alive at the time of Sir Percival's birth), and that his title and position were spurious, so he was not the rightful baronet.