Katie Hollen, a 15-year-old teenage girl , grew up in Africa with her zoologist parents, where the harsh natural environment has developed Katie's strong and brave character. Katie felt that she had learned the principle of survival of the fittest, but when she returned to the United States and came to a new environment, she suddenly found that the weak and strong between people are more terrifying than the natural world: Katie has gone through a long time. After traveling, he finally returned to the United States and came to study in an ordinary high school in Illinois. In order to adapt to the new environment, Katie secretly learned the "Law of Survival" and soon joined the school's glamorous small circle with a pleasant appearance.
Her docile character also won her two good friends. However, everything was calm and changed the moment she fell in love with the boy Aaron. It turns out that Aaron is the former boyfriend of the school flower Regina. Although they have broken up, the overbearing and conceited Regina can't allow Katie to intervene at all. Thus, a war between girls began quietly. About friendship, about dignity, about sincerity, about trust, how girls will learn and grow up.
