A troubled patient mistakes a doctor's compassion for adoration and becomes obsessed, willing to do whatever it takes to keep her in his life.

Charming LA architect Harrison, also a great cook and lover, gets engaged to Cate, a San Francisco landscape architect he meets while collaborating on a major project, after they get locked in by a malfunctioning elevator. She moves to LA for him and volunteers, while he's on mission in Tokyo, to mind his widowed mother Evelyn, still a major force in his life. However Cate gets paranoid when feeling weak and hearing rumors that his former girlfriend disappeared mysteriously years earlier, even cancels the engagement. Then the truth gets out, clearing Harrison and uncovering a lurking danger.