Casey Davies (Jesse Eisenberg) is not a very tough guy. He’s awkward and shy, mild mannered and keeps to himself since he doesn’t fit in with the other guys at work. He’ used to being told his name is very feminine sounding. One night after work Casey Davies realizes he is out of food for his dachshund, so he walks to the store to pick some up. On his walk back he’s beaten by a group of bikers and left in the street. After being attacked, he goes to buy a gun, something that “can fit into my hand”…or in terms everyone but Casey knows, a handgun. Ultimately, he decides on karate so he can defend himself. However, after a few classes, he realizes there is more to Sensei and his dojo.