In the endless history, any small mistake can generate huge offset future spatiotemporal, these offsets may make innocent people died, may result in the destruction of a nation, but also may lead to the whole human extinction...... The distant future, all have a messenger superhuman abilities, shoulder the maintenance of balance in time and space shuttle mission, they appear wrong time nodes in the history, to avoid the correction of errors, the maintenance history in the normal track. They are the hidden line in history, walking in the space and time, after arduous, even their lives, only to help mankind to find the most accurate, the most bright, memory in the future.