Sapphire was a normal teenager. She went to high school, had friends, and had homework. But unlike everybody, Sapphire never went in the water. It was abnormal. Even trying the hardest to get the answer from her mom of why she wasn't allowed, she never got the answer. But everyone knows that patience cant stay forever. You cant listen to your parents forever. Sapphire knows that. But spending her whole life being obedient to her mom, she couldn't take it. That surprise's her. It was the first time she disobeyed her moms rules. But what was the danger? It wasn't like she was going to smoke or gamble? She was going to swim. That isn't wrong, isn't it? But sometimes mom's are right. Going in the water was Sapphire's biggest decision. Now she regrets it. In another way, it surprises her. But everyone should remember, Even the smallest decision can cost someone's life, and Sapphire's decision did. But in return it gave her the most astonishing secret. Something she couldn't tell. Something in which, it made her powerful. More than a mermaid.
In the epic conclusion to the Devil's Deal series, Freya has one final chance to discover the full potential of her own power, and to use it to restore balance in the universe - once and for all. After the destruction caused by Roisin, Ferya and Torix come to terms with their losses and mistakes... And prepare for a final battle that will change everything.