The Witch: Part 2 - The Other One

A girl wakes up in a gigantic secret laboratory. As the girl escapes from laboratory, she stumbles upon Kyung Hee, who is trying to protect her house from criminal gangs. When the girl comes face to face with a criminal organization approaching Kyung Hee's house, the girl overpowers them with overwhelming power, and in the meantime they start chasing her in the secret laboratory. Who is this mysterious girl and why is she being chased?