When Su Wan, a modern white-collar worker, was sorting out her grandmother's belongings, she used the blood of her fingertips to activate an ancient heirloom painting - this painting turned out to be a secret door connecting time and space: the front leads to the isolated city of Dajing in 950 AD, where the silver-armored general Xiao Ce is leading his troops to defend against drought and enemy siege; the reverse leads to the Mars Yinghuo No. 1 Base in 2140, where scientist Lu Shiyan is caught in an energy failure and radiation crisis and is in urgent need of support.
Su Wan transformed into a "trans-time and space logistics officer" and used modern materials to help Xiao Ce alleviate the food shortage in the isolated city and help Lu Shiyan temporarily stabilize the base. As the bond deepened, she traveled through ancient times to defend the city side by side to save Xiao Ce, but was in a dilemma because of Lu Shiyan's urgent call for help. Xiao Ce's straightforward protection and Lu Shiyan's delicate concern allowed her to gain true love in two time and space.
When the enemy attacks again and the danger of Mars explosion increases, the villain Lin Mo covets the Star Marrow to destroy time and space. Su Wan joins hands with the two to find the ancient original Star Marrow, convince the Space-Time Law Enforcement Team, and establish the "Space-Time Mutual Assistance Alliance." In the end, she did not need to choose between two choices - to hold a wedding with Xiao Ce in ancient times with the blessing of the whole city, and to enjoy the rising sun on both days when Mars is on the same land. The three of them used love as a bond to achieve civilizational symbiosis between ancient times, modern times, and the future, interpreting the warm core of "love spans time and space, and mutual help lights up civilization."
