Sabela is an 18 year old girl who lived all her life away from civilisation, in a hut with, her father and brother, working day in and day out in the boring job of cutting down trees. However, she does not want to be a lumberjack for all her life. Her greatest wish is to become an adventurer in the guild of the Children of the Sun and fight against all kinds of evil monsters that threaten the peace of the Green Moorland.

Sabela also wants to avenge the death of her mother, who was a Son of the Sun adventurer killed by the fearsome Monster King Maeloc. He is a sinister character who moves in the shadows of the Kingdom as he weaves an evil plan to end it up. A few days after her birthday, she defeats a monster that wanted to eat her brother in the forest. Sabela decides that she will become an adventurer. However, it won't be easy for her as she dies in her first fight.

 Fortunately, this is not the end of her adventure, because Sabela receives a gift from a mysterious force: 900 more lives, which she can use to become a legendary adventurer and put an end to the life of her mother's murderer, Maeloc. This is how Sabela begins her adventure, one in which she will meet allies such as Rodolfo, a somewhat snooty healer, Melinda, a bit irritating snotty wizard, and Laura, an art history teacher who doesn't know really well what she is doing in a fantasy world. Together, they will face a multitude of dangers, but the question is... Will 900 lives be enough for Sabela to defeat the evil Monster King?