She is a perfumer who has lost her sense of smell. He is an insomniac, but he falls in love with her scent. An encounter on a rainy night revealed the secret of three generations: his mother killed her mother, and her father hunted her for the rest of his life. They are brother and sister, lovers, each other's antidote and poison. When all the truth was revealed, they chose not to pursue it anymore. Some love does not need to be known in full; some secrets never need to be opened.