A young painter stumbles upon an assortment of odd characters at an English estate where he has been hired to give art lessons to beautiful Laura Fairlie. Among them are Anne Catherick, a strange young woman dressed in white whom he meets in the forest and who bears a striking resemblance to Laura; cunning Count Fosco, who hopes to obtain an inheritance for nobleman Sir Percival Glyde, whom he plans to have Laura marry; Mr. Fairlie, a hypochondriac who can't stand to have anyone make the slightest noise; and eccentric Countess Fosco who has her own dark secret. The artist also finds himself drawn to Marion Halcomb, a distant relation to Laura for whom the Count also has plans.
Alexis Smith
as Marian Halcombe
Eleanor Parker
as Laura Fairlie / Ann Catherick
Sydney Greenstreet
as Count Fosco
Gig Young
as Walter Hartright
Agnes Moorehead
as Countess Fosco
John Abbott
as Frederick Fairlie
John Emery
as Sir Percival Glyde
Curt Bois
as Louis
Emma Dunn
as Mrs. Vesey
Matthew Boulton
as Dr. Nevin
Anita Sharp-Bolster
as Mrs. Todd
Clifford Brooke
as Jepson