Spoiler alert! The main character of the novel, Matt Johnson, decided to travel to the night that his parents died in a car accident. He left the letter for his friend, Linda, and told her his idea. He entered the date of the accident in the computer, but an error occurred and he went to the wrong time, the Industrial Revolution period. In this situation, Linda decided to help Matt. They changed the past by saving the daughter of the mine owner. As a result, the future was also affected. But nobody knows whether it is good for the future or not!
This entire review has been hidden because of spoilers.