Elena falls into trouble because of her sister, Kathleen, and the crowd she hung out with. Elena is discovered in a raid a month after being abducted and Kathleen being killed. CSI Eric Delko takes a special interest in Elena and finally gathers the courage to ask her out on a proper date, after making sure she receives treatment and continues to see a therapist. After being alone and afraid, Elena begins to trust Eric. After three friendly dates Eric vows 'By The End Of The Night' Elena will be his for the rest of their lives.