One day, he received an email from someone who called herself Mary asking for help about a bizarre murder case. Mary's helpless, lonely, and desperate voice made him lend a helping hand. After several failed attempts, they finally made an appointment to meet at a coffee shop. In the busy coffee shop, the two of them arrived on time. Although they sat in the same seat, they couldn't find each other. Finally, they connected a video call. In the same shop and on the same sofa, they were in different times. What was even stranger was that Mary looked exactly like someone he had known before but her temperament was very different...
