Top programmer Lu Xiaopao received a blackmail video of her sister Lu Xiaomei being kidnapped and asked Lu Xiaopao to pay 1 million yuan to ransom her. The younger sister Lu Xiaomei, who was successfully "rescued", and Lu Xiaopao broke up. Unexpectedly, Lu Xiaomei was accidentally kidnapped by the cybercriminal gang "Black Domain", and the rescue operation began.
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