The book starts with a few scientists interviewing one of their most promising participants, Lisa Allen, of their experiment regarding habits. Lisa had transformed herself in a very short period from being an obese, excessive smoker and alcohol consumer to a very fit person void of all smoking and drinking. The scientist enquires about how she was able to transform herself so vastly. She tells them that she took an initiative to change herself on a vacation trip to Cairo, Egypt. A few months before the vacation her husband returned from work one day and told her that he was leaving her as he fell in love with some other woman. After she processed the fact she was getting divorced she started to mourn about her husband leaving her, later she started spying on her husband as he spent time with his new companion, then she started prank calling the woman, with whom Lisa’s husband now lived, at late night and after a while directly confronting the woman. She abused the woman when she was totally drunk. After that she planned for the vacation even though she was already having a huge amount of debt accumulated. When she was in her room in Cairo she again broke down and formed a goal that after a year she will once again return to Cairo and trek a desert.
The scientists looked at the fact that all the participants like Lisa started with changing one particular habit and then moving on the next one. The scientists recorded Lisa’s brain activity and stated that when there was some mouthwatering food dish presented in front of Lisa there were patterns showing that she still craved to eat it but new pattern will appear which would make her resist the temptation of eating to her satisfaction level.