Plot

Seo-young grapples with emotional scars from her childhood, battling tinnitus and vertigo since relocating to her new high-rise office. Amidst her struggles, she secretly dates Jin-su, the development team's manager, but their relationship faces an unexpected challenge. Meanwhile, Gwan-woo, mourning the loss of his sister, performs precarious window-cleaning at the 70-story Landmark Tower. During one of these jobs, he catches Seo-young's eye as she watches him in fascination from afar, igniting an intriguing connection that intertwines their lives.