Lucy is a normal 24-year-old American woman living and studying in Taipei, Taiwan. It seemed to be a simple job as she delivered a mysterious briefcase to his boyfriend's boss - Mr. Jang. But it turns out to be a terrific deal in as she is captured and forced to act as a drug mule for a new and powerful synthetic drug. When the bag she is carrying inside of her stomach is broken and leaks out the drug into her body, Lucy experiences increadible changes that begins to unlock her mind's full potential. With unimaginable powers, Lucy transforms herself into a merciless warrior and plans to take down her captors.