Serena Dali is the sister of Tracy Dali and the Undertaker's sister in-law. There's no love lost between Serena and her tyrant of a brother-in-law however when the pregnant teen is forced to move in with her sister until she can leave, she soon finds out that behind Mark's arrogant attitude towards her, there's a nothing more than a gentle giant. On top of dealing with him, she also becomes her sister's personal diary and holds a secret that could destroy their marriage forever.