Four years ago, Nana left home to live on her own, growing distant from her older sister Noa. But upon learning that their father has been given only three months to live, and moved by his wish to spend his final days with family, Nana decides to call Noa back home. Returning to their childhood house, Nana is deeply affected by Noa's grief over the impending loss of their beloved father, and draws close to support her. Amid this emotional turmoil, an intense attraction begins to grow between the two sisters, drawing them into a deeper, forbidden bond.