The plot is Alice is basically forced to return to Racoon City and the Hive to bring the Umbrella Corporation to an end and save the last living survivors. That was all that it was about, literally this is all that happened, and there was no character development or plot development, neither did it add anything to the rest of the series. The only thing it did was put an end (maybe) to the Resident Evil franchise. I am sure that if they feel like it they will find a way to make another movie since they have been so profitable.
I had so many problems with this movie. It begins with Alice coming out of a hole with no additional information, and if it has been a while since you have watched the last movie you might not know what is going on. From the beginning Alice seems to have forgotten everything from the previous movies, and she no longer seems to know how to fight or protect herself, against anyone or anything. She continually gets her ass kicked throughout the entire movie, by monsters, by zombies, by humans, and by clones. She acts like she isn't strong, and she acts like she doesn't know how to protect herself, which is something she has been doing the entire series.
When she meets up with a group of survivors we learn very little about them, so why should the audience care when anyone dies. In fact the only character to root for is Claire (played once again by Ali Larter). If you have watched the movies you have seen her go from a wide-eyed innocent to a kick ass woman. The problem is that she isn't used very much in the movie, and the only character development we get for her is that she is in a relationship. It is all very dull.
This movie has none of the things that I enjoyed in the past few movies, especially since she continually gets her ass kicked. Part of the fun of these movies were the action sequences, but they weren't much fun in this film. I can't believe I am about to write this, but there were way too many zombies, and none of them were interesting. The monsters weren't even interesting because there were only a few of them throughout the movie and they were sparsely used. The biggest monsters are the humans, and even they aren't interesting.
I really disliked this movie. It didn't bring anything to the Resident Evil series, and it wasn't very well done. I feel like someone could have done a lot better job ending the series, in a more cohesive and interesting manner, that would have made me feel like the series was ending as well as it began. But, no, it lost steam and was just awful.
I don't recommend watching this movie, not only was it not good, but it did not live up to the rest of the movies in the series, even the last one RESIDENT EVIL: RETRIBUTION, which I didn't think was great, but it did have some fun in it.