A simple action flick. The concept is little more than "let's bring Jackie Chan and John Cena together and let them fight a bunch of baddies", and that's exactly what you're getting here. That's not necessarily a bad thing, certainly when the film is quite short and to the point, but high-class cinema this is not.
Chan leads a team of mercenaries who signed up to rescue some workers from a plant. They are under attack and need protection, but the way out is very dangerous. Cena is one of the people assigned to stop Chan and his team, but when he learns that he was fooled by his bosses, he teams up with Chan to fight for the good guys.
Chan and Cena are a decent team, though their style of comedy is pretty predictable. It makes for a lighter atmosphere, which in turn makes it easier to forgive the film some of its wonky CG. There are some solid action choreographies, but nothing too out of the ordinary. Simple but honest action entertainment.