Cheng Cheng, who was waiting in line for the restroom, was manipulated by an unknown set of rules. Opening his eyes, he found himself stuck between life and death, trapped with a group of strangers in an urban cemetery. The moment the broadcast sounded, everyone had to dance; those who did not dance were erased by the rules. Relying on hardcore reasoning, he cracked the rules all the way and snatched the 'right to interpret the rules', holding out until dawn, only to discover that it was not humans who were killing him, and the broadcast was merely a tool—the true rules were buried deep underground. Changing the rules required repayment: the dead who had helped him burned down one by one, and the cemetery gate recognized only one person. He survived, but he survived alone. Back in the mortal world, his phone popped up with a new 'grave-sweeping notice': the next grave mound is waiting for him.