Warning lots and lots and lots of spoilers you been warned!
The film starts out at a League of Assassins base camp. Here Ra's al Ghul, Talia al Ghul, Damian and the league are attacked by the main villain of the film Deathstroke!
The League of Assassins (a group of bad ass ninjas) are quickly overpowered by Deathstroke's forces (more highly equipped ninjas) and Ra is killed in the fighting.
Having barely escaped Deathstroke's clutches, Talia needs somewhere safe to hide her son Damian and where better than with his unsuspecting Dad. Here enters the caped crusader Batman. Finding out he is a Dad and has to now guide a wayward son who has a thirst for bloody vengeance. Bruce Wayne finally has a true purpose in life.
Nightwing, mutagenes and Manbats (never fully explains why them). During this time Damian dons the mantle of Robin and finds his assassin training being questioned by Batman's own moral code. Caught struggling between the two worlds, this ultimately shapes Damian's persona and during the final showdown against Deathstroke he has to chose the path of the League or the way of Batman.
Overall I enjoyed the movie. The story plot moved along at a pleasant pace and it felt well thought out. The fight scenes had a real anime/manga feel to them, which led to an interesting and exciting look about them. As always not everything was great. Damian just came across as a spoiled
Did I enjoy the Film? Yes
Would I watch it again? Yes
Would I recommend it? Yes
So how to score it. I'm going to score it three Gangster Gorilla's out of five.