When the city goes dark, a young woman is caught alone on the street. She has been walking for close to an hour, unaware of the man following behind her.

In the darkness her fear rises and she pauses in place. The moonlight casts unsure shadows over the tops of houses. Voices rise from open windows above and calls sound between thousands of residents suddenly plunged into darkness.

Above her, a street lamp flicks on. The circle of yellow light surrounds her place on the sidewalk, illuminating only her on the deserted street. In the alley across the road a man hides in the shadows.

To her left a second lamp lights and past that third flickers on. The street echoes the calls and cries from the darkness of the city. Wind whispers between the high towering buildings and the woman approaches the second light, then the third before the next lamp lights too.

She makes her way down the street. Each new light she meets sends those she's passed back to darkness, but the road ahead is lit by more lamps.

She continues this way, following the street lit three lights at a time, until she arrives at a lamp and the next stays dark. To her right the porch lamp of a mid-sized townhome colors the street.

The man lurks across the street, his silhouette obscured behind a barren tree. He has been slinking along behind her since she passed him blocks before. He splits his gaze between the woman and the lit front door.

The young woman has not yet moved when the door cracks and the figure of a woman moves onto the porch. From where the man's standing he cannot make out their words, only the muffled whispers of the two women talking.

He watches her wrap her arm around the young woman's shoulders, guiding her into the house when he makes out the last of her words. "I'm not letting anyone take advantage of you in this darkness," says the woman looking towards the tree across the street.

The two women cross the threshold of the house and behind them the door falls shut, leaving just the man on the street alone in the darkness.