In the troubled night of Seoul on the verge of apocalypse, Niko, a penniless scriptwriter, works a part-time job as a companion for people who have lost their keys. When she can no longer satisfy her longing for true love in this once melancholic, sensual, and bustling city, she disappears. Her boyfriend Jeremy and their new friend Ji-eun start looking for the missing Niko and become entangled in a love triangle. At last, Niko finds a new, reckless, and ultimate way to express her feelings.