Three Halliwell sisters discover that they are descendants of a line of good female witches and are destined to fight against the forces of evil, using their combined power of witchcraft known as the "Power of Three".
These are the brand new adventures of Merlin, the legendary sorcerer as a young man, when he was just a servant to young Prince Arthur on the royal court of Camelot, who has soon become his best friend, and turned Arthur into a great king and a legend.