This is made from the 28 days trilogy made by Alex Garland

In the year 2030 britain has fallen into a outbreak that spread across the island 28 years ago and caused everyone who live in that island to be globally quarantined by all european countries. The virus known as the Rage Virus had caused people to go berserk like rabid dogs. Early days the infected are often mindless and ignore any source of nutrition such as food or water.

28 years later - the virus had evolve into a more diverse in groups with some (though related to the original virus) transformed into skilled hunters that adapted well in the wild with most commonly hunt in packs and making hunting strategies in order to survive. But some evolve to be far beyond and become powerful alphas with strength beyond human. But others preferred to play the easy game with slow lows just crawling around eating insects and crawl on the ground.

Survivors now live in isolated islands and turned them into villages and using either the sea or other natural barriers to keep the infected away from their settlements. Though patrol boats from europe constantly lurk across the ocean not to guard the island from outside but to keep those in