Beom-Seok, known as Seok, walks down the sidewalk in Manhattan, New York, on his way to his job. Sunlight peeks through the clouds above. Leaves among the trees rustle faintly from an unseen breeze. He checks the time on his phone before tucking it away, and continuing his walk to work. However, something - someone - catches his eye. A young woman not far down leans against a brick wall, close to collapsing, her hand resting over her heart as her breathing is fast and hard. A concerned frown appears on Seok's face.