Riddick is story of aliens who stay in an other planet. Riddick is the main character of this story. Riddick is a king of planet who go some where with their guards but they guards want to kill him. but riddick kill them and now riddick in lonely place there is only wild animal nothing else. he have to kill them for their safety and food too.
Riddick catch a pet and they both stay together. after few time an other person came that place to kill riddick and try to kill them. but at the end riddick kill them all and go back their home.
Movie story is different but really very nice. action and adventure both are so good.You will like to watch this movie. Its a nice movie on such a nice theme.