Nathalia Guitry is an enigma that psychotherapist Doctor Faber can't solve. A photographer who can't take photographs since witnessing a murder, she is self-assured, self-aware, and seemingly impervious to his usually effective techniques. He hasn't been able to stop thinking about her since she walked into his consulting room and shattered his predictable professional routine.

Desperate to break through Nathalia's uncrackable façade, he proposes something unusual: she'll write him a story about each resident of the building opposite, moving up floor by floor. But as the therapy progresses, he finds his own mask beginning to slip as he becomes consumed by her tales. How does she know so much about these strangers' lives? And what's waiting on the final floor?