Timid Ru does everything to stay out of trouble, preferring solitude. However, each night at home, she senses someone watching her. Unsure if the danger is real or all in her head, she finds herself chasing the adrenaline of being observed.

With no recollection of a traumatic night, Ru's world shifts when a mysterious gift appears on her doorstep, forcing her to acknowledge the unsettling truth—she is being watched, and danger looms. Waking up alone with her masked intruder, her sole goal becomes survival.

As her secret desires are exposed, Ru faces the ultimate test. How much can she endure before giving in? Will she resist the truth, or will the masked man turn her world upside down?