Starts out with Lenina who is considering to go to the Conservation with Bernard. They both go and meet a Caucasian man who was raised there named John. John and his mother are brought back to BNW society. John is introduced to all of the things BNW has to offer.
Once John’s mother dies he experiences a mental breakdown and is brought to the Controller. After he is denied a return to his society, he runs away in isolation and purifies himself. This is witnessed by some BNW citizens and is publicized by the media. The novel ends with John committing suicide. For a more detailed summary check out In a Nutshell.
Technology is used in the book for instant gratification too. These new ways to do things make it a lot easier for the person to accomplish simple tasks. In the book the citizens use so much advance technology that they are lazy.