With hopes of escaping some Alien predators, Riddick activates an emergency beacon which eventually activates a new problem for him as his old time nemesis comes chasing as well.
What's disappointing about Riddick is that it never seems to figure out why we would want to follow the main character, outside of his propensity for violence and snark.
He's spent the bulk of his career hiding in franchises, hypermasculinizing himself. We can live with this. But this new movie makes you wonder whether Diesel can.