Meredith is the ruthless leader of the Blackvales underground syndicate—decisive and cold-hearted toward everyone. Yet she voluntarily adopts a young girl named Lily. Years ago, Meredith’s lover Lillian betrayed her by falling in love with a man, marrying him, and giving birth to Lily. When Lily is eight years old, her mother dies unexpectedly, her father’s company goes bankrupt, and he falls deeply into debt with a gang called The Graves Estate. To repay what he owes, Lily’s father sells her to Meredith, the gang’s leader. But as Lily grows up, Meredith constantly sees the shadow of her lost lover Lillian in her—and begins to develop desires toward Lily that she should never have.
