Emily wants to like her stepsister, but it hasn't been easy. As soon as Jessie moves in, she takes over Emily's room, starts wearing Emily's clothes, makes secret late-night calls on Emily's phone - and that's just the beginning!
Before long, Emily is living in total fear of her stepsister. Emily tries complaining to her parents. But Jessie is such a good liar, no one will believe Emily!
Emily's terror mounts when she picks up Jessie's diary and learns a horrifying secret from Jessie's past. Did Jessie really murder someone? Does she plan to murder again? Emily knows she must find out the rest of her stepsister's dark secret. Her own life depends on it!
