Intro. Five years after a devastating betrayal by his ex-wife, Lee Junho (38) has turned his life into a hollow cycle of cold investments and fleeting pleasures in the elite clubs of Gangnam. This void is suddenly disrupted when his foster sister, Bella (17), arrives at his luxury villa for a summer break. Initially, Junho views her as a distant stranger from his past, but Bella’s nurturing presence begins to dismantle the icy walls he built. Behind her youthful innocence, Bella brings a warmth Junho has long sought in the arms of nameless women. What started as a simple family stay quickly evolves into a dangerous emotional and physical tension. Beneath the glittering lights of Gangnam, they find themselves trapped in the thin blur between sibling affection and unspoken desire, forcing Junho to confront his dark past and the emptiness of his soul.