At a birthday party held in the Sky City, the longevity star Yamada Miku (Tian Mukong) suddenly fell from a height, fell into a coma, and was rushed to the Imperial Hospital.The doctor on duty is Hideyo (Seiichi Tanabe), the husband of Sae Asami (Nao Matsushita). He does not know that Miku is actually his biological daughter, so he gives priority to the youngest son of the Minister of Health, Labor and Welfare who also needs emergency treatment for surgery..The surgery could only begin after the off-duty doctor arrived.

At the same time, Party J also regarded the matter as a special case and began to investigate the recent fall accident.Saei's eldest daughter Ruri (Miwa Arai) has always been at odds with Miku and was alone when Miku fell, so she became a target of suspicion.Faced with her mother's suspicion, Ruri had no choice but to turn to the only person she trusted - the tutor Ayaka Kujo (Koyuki) for help.

Things quickly took an unexpected turn.Saying finally confessed to Yingse that Minjiu was his biological daughter, and Asami's family was on the verge of collapse.In addition, unfathomable new facts about Kujo were also revealed, and Nanzawa Izumi (Kimura Fumino), who had been investigating Kujo's true face, also faced the unbearable truth.