Madonna's exclusive actress Chihiro Akino takes on the challenge of a full-scale suspense drama for the first time!A woman's corpse was found at a certain hot spring inn...Investigator Chihiro is involved in this case that everyone thought was a suicide.Chihiro infiltrates the inn as a proprietress because she can't throw away the line of murder.The dangerous act, which even her fellow investigators take their breath away, is related to a certain incident in which her husband died.Meanwhile, the second crime occurs as if to mock.As danger gradually approaches, how will the investigation go? ?