Madeline and Jonathan accidentally collide at a New York airport. They could have quickly forgotten the meeting, if not for one circumstance: amid the bustle they accidentally exchanged mobile phones. A mobile phone for a modern person isn’t just a means of communication. It stores what used to be trusted only to diaries and safes. Going through the memory of Madeline’s phone, Jonathan understood something that made him buy a plane ticket to meet her immediately. Madeline also spent many hours learning as much as possible about Jonathan—and she had plenty to tell him. The two of them will meet in New York to find the key to a mystery that once almost cost Madeline her life…