On his eighteenth birthday, Carlos receives a strange gift: his father, whom he never knew, has died and left him his apartment. As he goes though the man's belongings, Carlos comes across a manuscript that tells the unsettling story of a secret affair, a love child, and a butterfly. Is this a confession or pure fiction? As Carlos begins to make the apartment his own, he immerses himself in the tales of the Brothers Grimm left on the nightstand, embarking on a journey that will bring him closer to his father and teach him how to navigate the invisible borders between reality, fantasy, sanity, and madness.