Naomi Vista is an accomplished flautist, with a scholarship to one of the best music academies in the world. Just before her enrollment, both her parents die, throwing Naomi into a pit of despair. At the academy, Naomi is magnetically drawn to Raphael, a quiet and ethereal stranger. However, Raphael is not what he seems, he is a fallen angel. Through Raphaels guidance, Naomi rediscovers a love for life, however, this has attracted the attention of a gang of fallen angels that Raphael left years ago. The gang is led by Raphaels brother, Demeteri but it is Kyber, a bitter rival, who is intent on finishing what he started eight hundred years ago, to destroy Raphael. Meanwhile, the gang of fallen angels led by Demeteri are instigating a gang war in London to oust the current gangland leader with a man of their choosing - Eddie. Eddie is a lovable loser who after being manipulated by the fallen angels becomes a cold hearted killer. Set against the backdrop of a London gang war, Naomi and Raphael embark on a love story that will change them both forever.

在上帝創造人類之前，上帝和天使同住在天堂。當天使看到上帝多麼喜愛他的最新創作：人類。有些天使開始心生忌妒，於是在路西法率領之下反抗上帝，淪落到人間，稱為「墮落天使」。他們煽動人類犯罪，因為罪孽越深，就能使他們得到更大的力量，最終計畫是消滅人類。於是上帝派遣善良的天使到人間幫助人類。拉菲爾原是墮落天使的一員，卻不小心與人類女孩墜入情網，人神相戀是絕對禁忌，下場將是墜入無盡深淵的地獄，他該如何抉擇呢？