When young geology student Ida finds an unusual object at the bottom of a lake, she unwittingly becomes guardian to Millyera - a childlike spirit as old as the universe. In the sun-drenched seaport of Flora Bay, the growing, bustling industry of The Colonies brings colourful characters from across the globe together to stake their claims on a new land. With her colleges Gilbert and Celeste, Ida works to protect Millyera from those who would do the sea-spirit harm. In doing so, they awaken a long-dormant world of magic and danger.