You’re a securityguard who works at night in a bank building

Jiren receives a mission to kill one of the ministers involved in bank management

She wears black clothes and makes her way to the banks. She enters through one of the narrow windows and goes through the air ducts. She reaches the top of the minister’s office and descends slowly and lightly, and kills him quickly, without making a sound, she goes outside his office and sees you standing there but you don't seem to notice her