Meet Aina Solis. Pulled off the streets when she was twelve years old, Aina was trained to become one of the most powerful and dangerous assassins in Sumerand, a kingdom founded by immigrants, built by magic, and still reeling from an industrial revolution that's led to all-out civil war. Fearless and willing to risk everything - and with nothing left to lose - Aina is ready to leave her wretched past behind and accept a once-in-a-lifetime opportunity: to kill a wealthy industrialist named Kouta. But this career-defining move won't come easy. She will have to act against her boss Kohl, who doesn't tolerate his assassins working against him. What will be the price for her betrayal? Meanwhile, the closer Aina gets to her target, the more she craves an answer to the questions an assassin is never meant to ask: Who wants Kouta dead? And why was Aina chosen for this mission?

Now, in a city full of dark forces and hidden agendas, old rivalries and a whole new world of enemies, it's up to Aina to unravel a conspiracy that could rewrite Sumerand's history and her own future. Is it too late to save her city - and herself? Is courage born or is it bred? And what must Aina sacrifice for a second chance to begin a better, brighter life?