In the future, people are bred in incubators in order to in advance divide them into four classes - Alpha, Beta, Delta, Epsilon - each doing a specific kind of work; hard physical labour for the 'lower' class, intellectual kind of work for the 'upper' class. There is no religion and promiscuity is obligation. Bernard Marx is an Alpha working in the conditioning center who flies with his girlfriend Lenina in an helicopter to a savage reservation, where they crash. There they met the "savage" John and his mother and take them to civilisation to study the conditioning process on him. But the religious John is disgusted by civilisation and dies by falling off a cliff when a helicopter passes by him. Lenina and Bernard go on to have a baby.