Legally Blondes is about two twin girls Izzy and Annie Woods who live in Great Britain like their cousin Elle have a love for pink. They are moving with their widowed father to Southern California in Elle's house. When they arrive in California there are two chihuahua dogs waiting on them. They also discover that they have to go Pacific Preparatory a private school in which the girls must wear a uniform.
There first day at the private schools starts off on the wrong foot with spoiled Tiffany Donohugh, and they met a boy named Chris who likes Annie from the beginning. Tiffany apologizes for her behavior and becomes friends with the twins only looking out for her best interest. Izzy and Annie believes that Tiffany is their friend. However Tiffany is shallow and does not really want to be friends with anyone that is on a scholarship. The twins realize that Tiffany is truly not a friend when she reviles that they are on a partial scholarship. The twins befriend other students who are on scholarships like Chris. Izzy wants Chris and Annie to start dating but Annie thinks Chris likes Izzy.
What turns into a plan scheme blows up when Chris and Izzy are accused of cheating on a History test. They believe that Tiffany and Justin were the master minds behind the plan, and that Tiffany switched Chris's backpack. Annie and Izzy go to student court to prove Izzy is not guilty. They discover that Tiffany had got the answer keys and got Justin to break in to get the key.
Tiffany and Justin are sent packing on a yellow school bus headed for public school, and Annie and Chris are seen dancing at the school dance. Lizzy has found a mate as well Brad who also is a scholarship student but all this time he never let it out. However as the four are enjoying themselves Ashley Meadows Tiffany's friend warns them that it is not over maybe leading to another sequel.