"If indeed Time was a running- train, carrying in its carriages: all the passengers of the world... I have to say that- " "-I had gotten left behind." Those were Grette's last words, when she lost the chance to lead a normal life with the people she cherished. Simple words, yet they defined too many reasons. She felt like she was drowning under a sea of unconsciousness, slowly drifting away from reality. But something changes. In a world all by herself, she stumbles upon The Boy in the Mask, living among a group of strangers who address themselves as "The Witnesses". Is there a reason for them to be the only ones in that lonely world?