Who is she...

A man in a dark jacket walks down a city street while talking on a phone, then the scene cuts to a man in a light shirt and tie on a phone call in an office, followed by a man in a dark suit in a smoky, orange-lit environment, and finally a woman with long hair in a dark, industrial setting holding a weapon, before returning to the man in the office. The sequence alternates between these individuals, all engaged in phone conversations, in distinct urban, office, and industrial environments.