(Freely inspired by Arthurian Cicle)
Arthur, Lancelot, Ginevra and Morgana are four inseparable teens born and raised up in Avalon, a little Island lost in the middle of the Ocean.
In the morning of his 14th birthday, Arthur manages to draw out an ancestral sword situated in the centre of Avalon and he suddenly decides to leave the Island in order to get to the Continental Lands, by taking with him Merlin(a baby whose life-cicle is linked to the sword itself) and his little sister Morgana.
Two years later, Ginevra and Lancelot(who remained on the island) find out that Arthur is actually subjecting the principal South Kingdoms with tyranny, and they eventually decide to leave Avalon and get to the Continentals Lands in order to catch Arthur alive, stop his despotism and bring him back to Avalon, at all costs.