Katherine a.k.a (Kat) Gilinsky is 14 years old. And yes her brother is the famous viner Jack Gilinsky. Kat was known for being the bad girl in school even though she was only 14, she's also a cheerleader weird coincidence. What will happen when Kat meets her brother's friends also known as the "Magcon" boys ( I don't know what to call them now ). Will Kat fall head over heals for Hayes Grier who is also her schools quarterback ? Or will her brother forbid it? Well you just have to find out by reading on …