An accident caused modern young man Chen Yi to travel to Shanghai in 1937. The mysterious "system space" he carried with him became his only reliance in this turbulent era. In this troubled world where it is difficult to distinguish between ourselves and the enemy, Chen Yi must use modern knowledge and systematic capabilities to deal with various forces. Following thrilling spy missions one after another, Chen Yi not only discovered the amazing secrets hidden in the system space, but also developed an emotion with Su Wan that transcended time and space. At a critical moment for the survival of the nation, Chen Yi must make a choice: return to a safe modern life, or stay to complete a mission that may change history but requires the cost of his life? When the system space shines for the last time, is it a new life or an eternal separation that awaits him?
