Caviar, the talented mercenary must accept the fact that her destiny is connected with a mad Prince who repeatedly dies and regresses. to achieve her life goal of living a prosperous life with her two adopted sisters, caviar meets the prince and offers cooperation. "I will help you but you have to promise me one thing." "what promise?" "don't die and regress until your goal is achieved." so, can caviar realize its goal at the same time as helping the Prince?