Zero kara Hajimeru Mahou no Sho, also known as Grimoire of Zero, is an anime series that follows the journey of a witch named Zero and her half-beast mercenary companion, known as Mercenary. Set in a world where magic is real but misunderstood, the duo embarks on a quest to find the powerful 'Grimoire of Zero', a book that possesses the secrets of magic. The series explores themes of trust, identity, and the quest for knowledge.