Sabrina and Remy Callas have a set of rules to govern their lives - rules that keep them happy, safe, and intact. But since Silas Avondale came into their lives, Sabrina finds herself breaking more and more of the rules. He slipped past all of her defenses and seems hellbent on learning why the twins cling to each other so tightly and keep everyone at arms length. So she does what she can to fight off his advances and attention. After all, there's no room for one more person in her life - right?