28 Days Later
part of 28 Days Later

28 Days Later is a 2002 British post-apocalyptic horror film. Set in Great Britain, just after the turn of the 21st century, the story depicts the breakdown of society following the accidental release of a highly contagious virus and focuses upon the struggle of four survivors to cope with the ruination of the life they once knew.

Don and his wife Alice prepare dinner for their group of survivors in a heavily reinforced cottage somewhere in rural, Rage virus-infected Britain. As they eat their meal, they suddenly hear a young boy banging on the door begging to be let in. Don opens the door to let the child inside, who says he is from Sandford and has been fleeing his parents who are now "infected". Moments later, a pack of the Infected discover the hideout and break in, quickly overwhelming the group. Alice refuses to leave without the boy; a panicked Don abandons Alice and escapes in a boat, emerging as the sole survivor. Britain is quarantined. Over the course of 28 weeks, the Infected have all died of starvation and Britain is declared relatively safe again. The process proceeds throughout the weeks.