The whole story line basically revolves around Carlotta having a dream that her parents never left and what her life would have been like.
Shocker of all shockers, of course Carlotta finds that she wouldn't have liked her life. (view spoiler)[ Her mother is still an alcoholic, her father is still cheating, and her parents' relationship is a rocky facade.
Her brother is a druggie asshole who dates strippers and hates his sister and her husband, Peter, is hiding something from her.
And, Oh yeah, she's planning on killing Angela because she thinks Angela is having an affair with Peter.
And her attraction to Jack and Cooper (who is still secretly drinking on the job) is still present.(hide spoiler)]