A freighter exploded unexpectedly, and Agent Doug (Denzel Washington) was ordered to investigate. However, when he arrived at the scene, he found that it was his first time in this place, but he was very familiar with the scene in front of him. After careful investigation, Doug found that the explosion was closely related to himself. With the help of the government's time laboratory, which can learn about any event that happened anywhere within 4 days, he found that he had an unusual relationship with a mysterious woman, and this woman will cause a major disaster related to him in the future! Doug must go back to the past and lead history from one reality to another in order to prevent this disaster from happening.