Three‑year‑old mixed‑blood little girl Mopsy shows up alone, convinced that cold‑hearted vampire tycoon Dorian is her father. Though Dorian threatens to send her away, he keeps making exceptions to protect her. Bright‑eyed and lovely Mopsy gradually softens her brothers with distinct personalities in the manor. Through accidents and daily moments, this child bridging vampires and werewolves heals the whole family with innocence, gains complete kinship, and officially becomes a member of the Blackwood family.