An unknown virus epidemic breaks out in modern cities, and the city is isolated as a "survival zone." Su Wantang, the tomb keeper, inherits the management rights of her grandmother's cemetery and controls the emergency supplies and safe terrain in the cemetery. Lawyer Lu Mingyuan needs a stable place to stay in order to find his missing sister, so he asks to cooperate with Su Wantang on the condition of "contract marriage". The two went from being on guard against each other (Su Wantang was wary of Lu Mingyuan's rational calculations, while Lu Mingyuan disliked Su Wantang's status as a "mausoleum keeper"), to gradually revealing their softness in the apocalyptic survival - Su Wantang used the herbs left by her grandmother to help Lu Mingyuan treat her injuries, and Lu Mingyuan used legal logic to help her formulate a material distribution plan, and even clashed with gangster forces to protect her. In the end, in the process of searching for their sister, the two discovered that each other had already become each other's "survival obsession", and the contract marriage turned into real dependence.
