Akasha is a precocious young girl with dreams of motherhood. She lives in a fantastical world where most of the oceans circulate in the aquamarine sky waters. 

Before she was born, the Helios, a tribe of angels from the sun, came to Earth to deliver the Surge, the next step in the evolution of an embryonic human race. Instead they spawned a race of hybrids and infected humanity with a hybrid seed. 

Horque manifests on Earth with another tribe of angels, the Solarii, to rescue the genetic mix-up and release the Surge. 

Akasha embarks on a journey from maiden to mother and from apprentice to priestess then has a premonition that a great flood is imminent. All three races – humans, hybrids and Solarii – face extinction. 

With their world in crisis, Akasha and Horque meet, and a sublime love flashes between them. Is this a cause of hope for humanity and the Solarii? Or will the hybrids destroy them both? Will anyone survive the killing waters of the coming apocalypse?