On the border of England in the Victorian era, orphan Ella was adopted by the Earl of Hawthorne family from an early age. The earl treated her like his own son, and each of the three "brothers" was gentle. She thought she was a lucky person favored by fate. On the eve of her eighteenth birthday, she found a sheepskin contract in the family secret room: every night of the blood moon, the Hawthorne family must sacrifice a pure-blood werewolf girl to extend the immortality of the vampires in the family. And she is the only pure-blood sacrifice that has been carefully cultivated for hundreds of years - the so-called "raising" is just a fattened lamb. The blood moon is in the sky and the ceremony starts. Ella bit off the silver chain on the altar, broke the colored window and escaped into the blizzard. The person chasing her was not a hunter, but Caleb, the youngest son who had taught her how to ride a horse since childhood and blocked a knife for her. What he handed over was not a silver sword, but a blood-stained cloak and the words: "Run north and don't look back." An escape across the wilderness began. Behind her is an entire clan of vampires hunting her, above her head is the full moon that is about to transform her for the first time, and next to her is this "brother" who betrayed her bloodline. Ella must learn to embrace the wolf within her in seven days, and Caleb must choose between his immortality and her freedom. When the sun rose on the eighth day, a wolf howl came from the end of the wasteland - that was not her voice, it was the entire northern wolf pack responding to her call.
