Game tester Lin Beiyang accidentally binds to a princess protection system, forced to repeat a death loop over and over again, just so the princess can survive. He originally planned to fix the bugs and go home, but found out that these bugs could never be fixed no matter how hard he tried. Who would have thought that she died 99 times, and every single time was on purpose—until she met this fool, who wanted to save her every single time. Deep within the palace walls, who is plotting step by step? Who is creating the murderous intent?