A 18 year old girl named Cassidy or Cassie for short lives with her father Karl stepmother Darcy and her stepbrother 23 year old Tyler. They all moved in with each other when Cassie was 14 everything was perfect and everyone got along until Cassie turned 18 then Tyler moved out to collage and doesn't come home. When Tyler finally comes home after hearing the breaking news of Karl and Darcy getting married what will happen when he sees his stepsister will things stay the same of will those dark dirty desires come out. Read to find out.