Keika lives with her beloved husband Mitsuo, father-in-law Masutaka, and brother-in-law Koji. Mitsuo is always concerned about not only Keika, but also Masutaka, who lives on a pension, and Koji, who is job hunting, and is an absolute presence in the Yuki family. One day, Mitsuo disappears. No matter how long they wait, no good news arrives, and the Yuki family is left in darkness, as if they have lost the sun. Eka, unable to bear witness to Masataka's deterioration, vows that she must protect this house until her husband returns, but...