Mobile phones record people's unknown secrets, but any secret can also be spread through mobile phones; mobile phones can communicate closely with people on the other side of the world, and make people next door feel as if they are far away from each other; mobile phones are becoming more and more convenient for our lives, but they also spy on our lives. The series tells 10 stories closely related to mobile phones and mobile Internet in the Internet era we are in today: a girl watched a video of a class reunion a year ago and accidentally discovered a password hidden in the video; an online writer made friends offline but encountered a mysterious reader; a man with amnesia pieced together his life through his mobile phone... Each story is a journey through the screen and facing the unknown.