Okay kiddo, Dragon Blade is a movie about some really cool dudes who live in ancient China a long, long time ago. They're all very brave and strong and are in a big fight with each other.
One of these brave dudes is named Huo An, and he's played by Jackie Chan (who, you might know, is a famous martial artist and actor!). Huo An is a good guy who has been banned from his country for something he didn't do wrong. He's traveling with his friends and trying to keep everyone safe.
The other dude is named Tiberius, and he's played by a guy named Adrien Brody. He's like the bad guy in the story because he's trying to take over everything and fight anyone who gets in his way.
So, Huo An and Tiberius ended up meeting each other, and it's not very friendly. They're both trying to win this big fight, but they have different ideas about how to do it. They end up making a deal where they have to work together to fight against some super tough bad guys who are trying to take over everything.
There's a lot of action and fighting, and it's pretty intense, but it's also pretty cool to watch. The movie is about how these two enemy dudes come together to fight a bigger enemy, and they learn to respect each other and work together to save the day!