Meet the girlfriends! Polly, Keri, Frizz and Lily. They're the Gang of Four, and they're going to stick together for ever and ever! Their bond of friendship is severely tested, though, when they discover that they are all going off to different schools in the autumn. And poor Frizz is going to be left with their arch enemy, Jessamy James, a show-off who wears pink knickers, which they all know isn't cool!