It was a sanatorium in the highlands. Patients such as Totsuka, Hirota, and Hashida were battling their illnesses under the devoted care of Michiko, a nurse so beautiful and noble that she was nicknamed “The Messenger from the Moon.” When Totsuka learned that Hirota, who was about to be discharged, secretly loved Michiko, he devised a plan and arranged for them to spend some time alone in a birch grove. Hirota and Michiko made a firm vow for their future, but around that time, an unexpected visitor arrived at Hirota’s hospital room.