Shortly after their wedding, Yukino's husband continues working as a busy physician, with Yukino fully devoted to supporting him. However, when her father-in-law Ryunosuke moves in, the household atmosphere changes drastically. Around this time, her husband is suddenly assigned to overseas medical aid in a remote area for one year, with no phone contact allowed. Tormented by loneliness and anxiety, Yukino gets drawn into her father-in-law's deliberate actions. Behind it all lies his hidden agenda.