Stella Maris is a beautiful, crippled girl, who is cared for by a rich family. They shield her from the harsh realities of the world, so that she has no idea of the cruel things that some people do. Unity Blake is a poor orphan all too familiar with the harsh realities of the real world. These two young women both fall in love with John, love which is complicated by the fact that he is still married to (though separated from) a bad wife.
