In the western United States in 1873, Jack Logan (Daniel Craig) suddenly woke up and found himself in the desert. He had no idea why he was here, and there was only a mysterious metal device on his wrist. In order to regain his lost memories, Jack returned to the town. But he found that the residents of the town were not very friendly to him, and if he wanted to stay in the town, he had to get the approval of Woodrow (Harrison Ford), the town pioneer. However, the most terrifying thing happened. Several strange alien spacecraft suddenly appeared and robbed many people in the town. At this time, Jack suddenly touched the metal device on his wrist, shot down an alien spacecraft, and assembled to recover some memories. In order to save the people who were captured and find out the intentions of these unknown alien spacecrafts. The town united, and under the leadership of Jack and Woodrow, they went to the direction where the alien spacecraft flew away to find answers.