Millionaire Joshua Barker insists that his daughter, Faith, must marry Phil Langhorne, a man that neither likes, and Faith is in love with and eager to marry her childhood sweetheart, John Temple. Mary sets out to investigate what hold Langhorne might have on her father. The search takes her to an island during a fierce sea-storm on a dark and windy night,and the sentinel light in the light-house suddenly goes out, and the family yacht is about to crash upon the great rocks of the island.