Three-year-old Yuna is born with extraordinary strength and a huge appetite, and has always longed for a warm home. By chance, she meets the stranded Cedric Sterling, and decides that he is the "family" she has finally found. From then on, the pair embark on a fun and heartwarming journey together. The innocent and kind Yuna infects everyone around her with her optimism, while the cold-on-the-outside, warm-on-the-inside Cedric gradually learns to express his care as he spends time with her.