Angel Has Fallen continues the plot of one man saving the day. The difference this time is that the protagonist is framed. While not as engaging as the original Olympus Has Fallen (2013), this movie delivers exactly what it intends to: straight forward mindless action and explosions. The identities of the villains are fairly obvious early on, so there is no surprise, with the exception of a new character who helps. It was established that the protagonist suffered injuries from before, but when it comes to fighting bad guys, the injuries do not take any effect.
Note: There is a mid-credits scene which is odd.