Time travel is made viable, civilization creates genuine artificial intelligence and allows humans to upload their minds into robotic forms which outperform human flesh. They become known as Machine Minds. The future looks bright.

Until it's found that technological development is in fact beginning to slow. Even regress.

Flawed artificial intelligence and failed uploaded Machine Minds rendered insane through the transformation process are sent back in time in an attempt to find a solution. By developing innovation earlier in history the plan is to kickstart civilisation.

Organisations, companies, and military groups attempt to control the path of human development over the flow of time.

A man calling himself the Engineer and a unique Artificial Intelligence called SSAI are forced to cooperate. This is the story of how they changed the course of history and forged a new path to break the Regression Machine.