I was a big fan of the original "28 Days Later" from 2002, and I also appreciated the sequel "28 Weeks Later" as well. I expected a "28 Months" movie fifteen years ago but it never materialized. So instead, almost 28 years after the original (really only 23) we get a legacy sequel which tries to restore the franchise to life, which is an odd thing considering that many people consider it a zombie film. Regardless of how it is classified, the new film stays relatively true to the preceding movies, with a couple of variations that are bootstrapped in to make the story feel more substantial and original.
An idyllic community has been established on a coastal island, which is only accessible on a bridge that is only accessible during low tide. While there is a threat of infection from the mainland, that possibility is remote. The bigger issues facing the community are limited resources, lost knowledge and in one case, the absence of medical facilities that might be life saving. The community has become a cult of rituals, meant to perpetuate the group and prepare youngsters who were born into this cloistered society, how to deal with the world they live in. The first act of the film is a father-son bonding ritual which involves confronting the outside world, killing some of it, and surviving the terrors that exist on the mainland. Spike, a twelve year old who trusts his father and adores his mother, gets confronted with a confounding situation when his expedition reveals things about his Dad and the world that his mend is not ready to handle.
If there is a weakness in the story, it is not in the action or characters but rather in the short sighted thinking of a kid. His motives are pure but his method is nuts and he should know that. The story becomes a quest for help that lays past the sections of the map that in the old days would be labeled "Here there be dragons". Spike is resourceful, but there are a couple of convenient moments that solve problems that he would have been unable to manage on his own. There is a good deal of tension in this middle section, as the threat of rage-infected humans looms around every corner. he action is intense, and the escapes are narrow, and the complications are interesting.
The third act is mystical and disturbing, and it is almost a polemic on euthanasia. Ralph Fiennes appears as the most interesting character in the story, and his narrative, while a little preachy, does give us some issues to think about. The conclusion of the movie will throw you off, but I understand that if you live in Great Britain, it will make a lot more sense. There are apparently two sequels coming so Aaron Taylor-Johnson, who plays the dad, will probably be back after disappearing from act two and most of act three. Jodie Comer will be missing for an obvious reason, but that should not surprise anyone who makes it into the movie for twenty minutes. By the way, the opening, which is a revisit to the onset of the zombie apocalypse, is smashing. Those sequences in these kinds of films usually are.