William Kell, the keeper of a lighthouse on a lonely stretch of coastline, marries cabaret dancer Eileen. His young wife, however, goes on to have an affair with Henry Cass, the handsome assistant later taken on by her husband; when she then begins to flirt with a stranger who is rescued from the wreck of a motor-launch, a chain of shocking events is set in motion...

Daubeney Carshott, a concert pianist, leaves London to dive for pearls on Thursday Island in the South Seas at the whim of Stella Raff, his fiancée. Once there, he discovers that the life he leads as a pearl diver is better in every way than his former existence as a social-lion pianist. He meets and falls in love with Lorna Quidley, after learning this Stella had send other suitors off in quest of a giant pearl for her.