The arrival of a lodger, Kate, will bring in welcome funds towards Jake and Marissa?s attempt to conceive. When Kate appears to be growing ever closer to Jake, Marisa comforts herself with the knowledge that their boarder will soon be gone. But while fertility treatments put Jake and Marisa?s relationship to the test, Kate seems to be veering into obsession with the couple. When Marisa sets out to learn who Kate really is, she threatens to reveal her own secrets and destroy the perfect life she?s created with Jake.