[1][2] The film stars Janine Chang and Jacqueline Zhu as two sisters who become voyeurs of a couple engaged in a heated moment near a window.
Ruxing who seeks inspiration for her novel, begins to chronicle the couple's interactions and later starts to secretly incorporate their neighbor's story into her novel.
One day Ruyi witnesses a heated argument between the Chens, until a shadowy figure entering their apartment and a scream pierces the night.
Ruyi's suspicions about her sister intensifies until She uncovers Ruxing's secret novel, revealing her intimate knowledge of the Chens' lives and her growing obsession with their story.
Ruyi confronts Ruxing about her clandestine involvement, questioning her motives and the extent of her responsibility in the Chen's disappearance, leading to a rising tension between the sisters.