Lin Wan, a high-IQ female academic, and her cynical rival Lu Zhi, are accidentally involved in a "cyclic death game" with the city as the chessboard. On the first day of the game, they both died. When they woke up, not only did time go back, but the two of them strangely swapped bodies. Under each other's skin, they were forced to go from being suspicious of each other to working together to solve the weird puzzles released by the game while loading files after death. As the cycle deepens, they not only have to deal with the escalating deadly crises in the game and other players with ulterior motives, but also deal with all the ridiculous troubles caused by body swapping in real life. More importantly, the misunderstandings and secrets buried deep in the two people's past, as well as the two-way secret love, are also peeled away layer by layer in this test of life and death. In the end, they will work together to uncover the ultimate truth of the game and face the source of fate.
