What if one day you found out to be sharing a soul with another person from a different time? And what if that person is no other than a historical figure ruling over the kingdom?

Sian was living a tragic life. Her parents had passed away, and her uncle and aunt, who took her, treated her basely without showing any affection. Her day-to-day misery finally takes an upturn when she gets sucked into a fantastical world she only read about in her books. When she opens her eyes, she is holding an Excalibur in front of the people who are too dazed to speak. When they come to their senses, people start to call her Queen Arthur. Everything is a blur, and Sian can't make out what's happening until she learns she is sharing a soul with King Arthur Pendragon.

Sian's adventure of becoming a queen begins, and it appears smooth sailing until she learns that she bears a mission, and that is to get a hold of the Holy Grail and correct the mistakes of King Arthur, ensuring that the people in the Kingdom of Britain will live happily ever after. Surrounded by her knights, the great wizard, and enemies, she sets out on the journey of becoming a wise and loving queen who wants to bring peace and happiness to this land.