The Witcher is about the old world fables of assorted monsters, elves, witches, curses and magic, filled with monster slaying, mass killing etc. But it's quite well picturized using grey filters and excellent quality CGI, which helps it appear less gruesome and not repulsive.

The protagonist is a good he-witch Geralt, who slays all kinds of monsters by his free will and also on being commissioned by someone else, but people in general still loathe him and don't consider him an equal, though a bard constantly sings the praises of his brave acts.

Another noteworthy character in this series is Yennefer, a deformed and ugly girl, who is sold by her step father to a witch for just 4 bucks. But step by step she overcomes her fears, harbors her ambitions and transforms into a stunning, ultra-confidant and an all powerful witch.

You will enjoy the series, if you are into Harry Potter style cinema, though the series is not centred around children.