When Lily meets Marcus at a gallery opening in London, she is immediately attracted to him. In less than a week, she falls deeply in love with the magnetic but elusive architect and moves into his echoing loft apartment in East London.

Nothing could have prepared Lily for what she finds there. A distinct presence of another woman lingers in the loft, one who seems to have disappeared in a hurry, leaving behind a single party dress hanging in the closet, a puzzling mark on the wall, and the suffocating scent of jasmine. Lily's unsettling curiosity turns to obsession as the spirit of this mysterious woman increasingly haunts her.

Who was she? What were the circumstances of her sudden disappearance? Marcus refuses to talk about the woman or her fate. The apartment's other inhabitant, Aidan, seems to understand Lily's concern, but he is also unwilling to give her any information.