Clara Black and the Hidden Chamber

This is book 2 to my last story Clara Black. Potter's Cousin? In this book, Clara, Harry, Ron, and Hermione are going in for their second year of Hogwarts education. The Chamber of Secrets has been open and everyone's top two suspects are Harry or Clara. But danger isn't all she'll face. Everything Clara knows is put to the test when she meets a strange group of siblings. A pair of fraternal twins and their younger sister. Their names are Adam,Julie(or Frisk as she prefers), and Emma Rhee. They seem amazingly cool and like loyal friends. But there's a hitch. Those twins, are Slytherins.