The phone in the lost-and-found box holds a number that hasn't rung in three years – intro video

You work the early shift at a convenience store in Shinjuku. The day before, a customer dropped a black phone with a cracked screen into the lost-and-found box. At half past six in the morning, a man in a rumpled suit stands at the register and asks: when was it put in? An hour ago, this phone received a text that read “Twelve o'clock, North Exit.”