A couple celebrates their son's birthday in the middle of the ocean on their boat . A violent storm hits and it brings up hungry creatures from the depths and they fight for their survival.
Alex Russo(赛琳娜·戈麦斯 Selena Gomez 饰)和法力高强但处于叛逆期的年轻魔法师Billie (贾尼斯·黎恩·布朗 Janice LeAnn Brown 饰) 出现求助,打乱Justin(大卫·亨瑞 David Henrie 饰)的平静生活。但是为了保护魔法师世界的未来 ,Justin决定“出山”,训练并教导Billie好好运用魔法。