The exceptionally gifted Ghost King, He Simu, unexpectedly encounters the young general, Duan Xu, while out on a break, searching for food. This young general, who carries an item belonging to someone from He Simu's past, seems not to be the real Duan Xu. As they test each other through subtle exchanges, He Simu gradually uncovers the dark past and aspirations hidden within Duan Xu’s heart. In turn, Duan Xu discovers the steadfastness and loneliness that He Simu has endured. Despite the fleeting lifespan of a mortal, no more than a hundred years, and the four-hundred-year-old ghost who still retains the appearance of a young girl, they resist the relentless passage of time through their love.

天赋卓然的鬼王贺思慕，在休沐觅食时意外遇见了小将军段胥。携带着她故人之物的这个小将军似乎并非真正的段胥？两人你来我往互相试探，贺思慕终于了解了段胥黑暗的过往以及心中的志向，而段胥也发现了贺思慕的坚守和孤独。寿命不过百年的凡人和四百岁仍是少女的恶鬼，以爱意抵抗时间洪流。