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Mrs. Ng, a young woman temporarily blinded after an operation, is left in the care of their maid while her husband, Dr. Jack Ng, is away for a business trip in Macau. Meanwhile, a strange man named Sam Chu ingratiates himself into the household with sinister motives, driven by a past tragedy. As Mrs. Ng's sight begins to return, she must navigate her newfound vision to uncover the truth about Sam's intentions and protect herself.